Tamper-evident seal provides an extra layer of security against tampering and theft Tear-resistant and stretchable plastic material ensures that your shipments arrive intact and undamaged. 51 Microns thickness makes the bags sturdy enough to withstand the rigors of shipping and handling.Versatile design makes these bags suitable for a range of applications, including e-commerce, courier services, and more.Waterproof Design: Each poly mailer keeps items safe from liquids. Avoiding damage from rain or snow. Item Dimensions LxWxH: 19 x 15 x 4 Centimeters Net Quantity: 50.00 count