Schwalbe Bicycle Tube AV7a Schrader 20*1.1/8-1.3/8 451

Manufacturers code: AV7A
This inner tube fits ETRTO tyre sizes as shown below:
37-438 - 20 x 1 3/8 inch
28-440 - 500 x 28A
37-440 - 500 x 35A
28-451 - 20 x 1 1/8 inch
37-451 - 20 x 1 3/8 inch
Weight: 105g