Dear Customer, all our stock are thicker version and additional thick version, is more stronger and stretchable, no worries of : -

Material: polyethylene

Thickness: 2MIL / 50 micron
(Thicker & Additional Thick version Available)
Size Tolerance: +/- 0.5 cm Count Tolerance : 100 pieces +/- 3 pieces
Available Color (1) White Surface, Black inside (2) Silver Grey Surface, Black inside (3) Green Surface, Black inside
Material: 100% PE
Features: Mailing bags, Waterproof, Self-seal, Tough

Sizes Available L*W (+ Fold/Seal width) 17cm * 26cm + 4cm seal width    (17x30cm) 17cm * 31cm + 4cm seal width    (17x35cm) 20cm * 26cm + 4cm seal width    (20x30cm) 20cm * 31cm + 4cm seal width    (20x35cm) 25cm * 29cm + 4cm seal width   (25x33cm) 25cm * 31cm + 4cm seal width    (25x35cm) 28cm * 38cm + 4cm seal width    (28x42cm) 32cm * 41cm + 4cm seal width   (32x45cm) 35cm * 41cm + 4cm seal width    (35x45cm) Adhesive Tape (Printed)