32mm (1-1/4") Trap Inlet Flat Washer

This flat 1-1/4 inch trap inlet washer makes the seal between the trap and waste fitting on your bathroom basin.

It is called a 1-1/4 inch washer, because it suits a waste trap with a 1-1/4 inch BSP thread, not because the washer itself measures 1-1/4 inch. The washer measures approx 40mm outside diameter and 32mm ID.