Repair or replacement of faucet components, rather than replacement of the entire unit, saves money and resources. Made of heavy-duty plastic, Zurn’s split ring washer (Part no. 59666001) is made to fit AquaSpec® faucets. AquaSpec® faucets contain a unique, heavy-duty quarter-turn ceramic disc cartridge. The cartridge is so durable, you can expect it to last up to one million cycles. When you need a replacement part for repair or maintenance of a faucet, trust Zurn for genuine, reliable parts.