The airmail envelope is an iconic and historic product that revolutionized the postal industry. It originated in the early 20th century when the use of airplanes became more prevalent in delivering mail across long distances. These envelopes were specially designed for airmail delivery, with lightweight and durable paper to reduce the weight and increase the speed of delivery.
Airmail envelopes were first introduced in 1918 by the United States Post Office Department, and quickly became popular for sending mail across the country and eventually, the world. These envelopes were marked with a special airmail stamp, indicating that they were meant for air transportation.
As air transportation technology improved, so did the design and functionality of airmail envelopes. They were made with various security features, such as internal security patterns, and included windows for displaying the recipient's address.
Today, airmail envelopes continue to be used for international mailing, with some designs even incorporating the traditional red and blue border of the original airmail envelopes. These envelopes serve as a reminder of the significant role that air transportation has played in the history of postal delivery.
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Aluminium bleacehrs are widely use in all kind  of outdoor activities like
School playgournd, basketball court, football field, other sports filed, event seating, player seating.Etc.
Stadium bleachers features:
1.Material is aluminium alloy 6061-t6
2.Disassemble,all parts could be seperate to storage
3.Modular parts design, easy to install
4.Stainless
5.Long life span
6.Economic
7.Environmental
8.Portable, you can use it in different event
Specifications
Material
Aluminium alloy
Size
1-20 rowsÂ
Seats capacity
0.45m/seats
Row width
650mm/750mm
Seats type
Aluminium plank
HDPE plalstic seatsFootboard
240mm
Row height
200mm
First row
400mm
Products show:
Side view
The size could be customized. according to your application and ground size situation, Our bleachers  could be 1-20 rows. and Length is unlimited. The seats could be aluminium plank or HDPE plastic seats.
Other size &Â applications
Â
About US
Guangzhou Smart Group is a leader manufacturer  of Bleachers,Truss, Stage, Tent, crowd control barrier. and Located in Guangzhou ,China. where is a world Business Center.
   All our production are follow the ISO9001 Quality management  system. and all products are passed the Certification of CE,TUV, SGS, etc.
Company Function Department are:
1. Design Department:
all products will be design by our professional designer before production
2. Production Department:
there are newest production line and complete production Machinery.  more than 10 years    experiences engineers will keep the products in good situation.
3. Purchasing Department
Keep all material are qualified and in Low cost
4. Sales Department
Follow the order from start to end, assist customer to communicate with factory to meet there private requirements
5. After sale service Department.
6. Development Department
we will keep our products are usefull and popular on the market, our teamer will update the style according to the market requirement.
Certifications:
Business Process
1. Provide your detail requirement
2. Factory make professional design according your requirement
3. Confirm the design and make quotation
4. make contract
5. Deposit by T/T
6. Production
7. Balance payment after production finished
8. delivery
9. After sale service
For more informations, please kindly contact our sales with below 
Â
Factory price wholesale angle aluminium stadium bleachers Â
Aluminium bleacehrs are widely use in all kind  of outdoor activities like
School playgournd, basketball court, football field, other sports filed, event seating, player seating.Etc.
Stadium bleachers features:
1.Material is aluminium alloy 6061-t6
2.Disassemble,all parts could be seperate to storage
3.Modular parts design, easy to install
4.Stainless
5.Long life span
6.Economic
7.Environmental
8.Portable, you can use it in different event
Specifications
Material
Aluminium alloy
Size
1-20 rowsÂ
Seats capacity
0.45m/seats
Row width
650mm/750mm
Seats type
Aluminium plank
HDPE plalstic seatsFootboard
240mm
Row height
200mm
First row
400mm
Products show:
Side view
The size could be customized. according to your application and ground size situation, Our bleachers  could be 1-20 rows. and Length is unlimited. The seats could be aluminium plank or HDPE plastic seats.
Other size &Â applications
Â
About US
Guangzhou Smart Group is a leader manufacturer  of Bleachers,Truss, Stage, Tent, crowd control barrier. and Located in Guangzhou ,China. where is a world Business Center.
   All our production are follow the ISO9001 Quality management  system. and all products are passed the Certification of CE,TUV, SGS, etc.
Company Function Department are:
1. Design Department:
all products will be design by our professional designer before production
2. Production Department:
there are newest production line and complete production Machinery.  more than 10 years    experiences engineers will keep the products in good situation.
3. Purchasing Department
Keep all material are qualified and in Low cost
4. Sales Department
Follow the order from start to end, assist customer to communicate with factory to meet there private requirements
5. After sale service Department.
6. Development Department
we will keep our products are usefull and popular on the market, our teamer will update the style according to the market requirement.
Certifications:
Business Process
1. Provide your detail requirement
2. Factory make professional design according your requirement
3. Confirm the design and make quotation
4. make contract
5. Deposit by T/T
6. Production
7. Balance payment after production finished
8. delivery
9. After sale service
For more informations, please kindly contact our sales with belowÂ
Â
Factory Price Wholesale Angle Aluminium Stadium Bleachers
Model NO.: SM-BL
Certificate: TUV
Seats Capacity: 0.45m/Seat
Length: Option
Row Width: 750mm
Trademark: customized
Transport Package: Air Bubble Form
Specification: 1-20 rows
Origin: China
HS Code: 7610900000
Model NO.: SM-BL
Certificate: TUV
Seats Capacity: 0.45m/Seat
Length: Option
Row Width: 750mm
Trademark: customized
Transport Package: Air Bubble Form
Specification: 1-20 rows
Origin: China
HS Code: 7610900000
Factory price wholesale angle aluminium stadium bleachers Â