Plastic bag HDPE (High Density Polyethylene) 58x100 cm 20µ yellow. Sold per box of 20 rolls. A roll contains 25 bags. The waste bags made from this material are manufactured under low pressure and low temperature. This causes the molecular chains to fit next to each other and the bond is less strong. These bags therefore have the characteristic that once there is a tear in them, the material tears through more easily. However, it is difficult to make a hole/tear in it (high puncture resistance).