Safety insert system – all tools vibration-proof embedded – missing tools are immediately noticed Cleaning option of the inserts (brush under running water, allow to dry - done!) Suitable for all Hazet tool trolleys with drawers. For the tool trolleys 173, 179 and 180, we also recommend plastic insert 173-36/5 or soft foam inserts 163-522x40 or 163-522x50 In safety insert system, 2-component soft foam insert 1/3+ (172 x 392 mm), Weight: 2.20462262 Pounds, Manufacturer: Hazet