This product is made to be installed with 50mm pipe or fittings, which actually measures 53.5mm. If your pipe or existing fittings do not measure 53.5mm, or has ABS printed on the pipe or fittings, this fitting is not compatible and you will require 56mm solvent weld fittings This listing is for a Pack of 5 50mm waste pipe clips grey 50mm pipe clip 50mm waste pipe clips, Manufacturer: Floplast