LASCO 0-1053 American Standard O-Rings for Aquarian II Series Single Lever Kitchen Sink Faucet, 2-Pack. American Standard brand. Aquarian II series - new style. Two pack o-rings. For single lever kitchen sink faucet. Made in USA! Larsen Supply a third generation family owned and operated company with over 80 years of experience has the largest retail plumbing line in the industry today with over 7000 packaged and 16,000 bulk SKUs. We pride ourselves on service, selection and support! All Lasco merchandise if warranted to be free of manufacturing defects. Please revert to retail place of purchase for resolution of any possible plumbing questions, warranty or defective part replacement.