Separate strain-reliefs for 4 mm2 cables with diameter Ø 12 - 17,5 mm. The strain-relief can be used with 5-pole plug and socket couplers without strain-relief, eg. NAC51.W and NAC52.W. Weight 23 g. NS5M2L.W for cables Ø 8 - 11 mm. 1-2 cables fits into this strain-relief. Weight 19 g. It is not allowed to sell or use this product in Germany.