【Compatible with Delta Faucets – RP37021】These rubber o-rings are compatible with Delta faucets only, including popular series like Victorian and Lahara. Designed to match the specifications of part number RP37021. Not for use with other faucet brands. 【Fixes Leaks at Faucet Base, Spout, or Spray Hose】Whether you're dealing with a dripping sink, leaky handle, or worn spray hose fitting, this kit offers a reliable sealing solution for common Delta-compatible trouble spots. 【Also Compatible with Delta Cartridge and Sink Strainer Applications】May be used in faucet maintenance where RP37021 dimensions apply, including cartridge o-rings, spray hose connections, and sink strainer seals compatible with Delta fixtures. 【Tool-Free DIY Installation in Minutes】Perfect for quick, easy home repair. No need for plumbing tools or hiring help—just remove the old o-rings and press in the new ones for an instant fix. 【4-Pack – Repair Two Faucets or Stock Up for Emergencies】Each Delta-compatible faucet uses two o-rings. Use this 4-pack to fix multiple leaks now or keep extras on hand for future repairs and emergency maintenance under the sink. Use these 4 o-rings and have extra spares for future needs, check the diagram to see where this o-ring is located in your faucet, before ordering please make sure you are looking for part number RP37021 to confirm this o-ring will fit your faucet