Fibre Washer for 1/2" BSP Tap Connectors, Washer is 18.25mm Diameter (Pack of 5). Fibre Washer for 1/2" BSP Tap Connectors, Washer is 18.25mm Diameter (Pack of 5) Fibre Washer for 1/2" BSP Tap Connectors, Washer is 18.25mm Diameter (Pack of 5) SKU : 100233 Fibre Washer for 1/2" BSP Tap Connectors For the connection of a water feed pipe to a toilet cistern For the connection of a water feed pipe to a sink tap Outside Diameter : 18.25mm Inside Hole Diameter : 15.00mm Thickness : 1.75mm Quantity in Pack : 5