- To ensure waste water can drain correctly and safely ,- Connection: straight: 21 mm/straight: 21 mm ,- Complete with hanging clip ,- High pressure resistance (crush resistance) ,- High resistance to chemicals ,- Extendable hose, allowing it to be used for lengths of 1.2 to 4 m , ,Note for Consumers: ,Hose clamps are required for assembly (item No. 110813 - hose clamp, 20-32 mm, not included in the extent of delivery).