The SDSI San Diego Seal Inc SS/Carbon/SC/Viton Repair Seal Assembly 1.25″ T-21 is a high-quality pump part designed for hydraulic, pneumatic, and plumbing systems. Made by MSR Mechanical Seal Repair in the United States, this seal assembly is specifically designed for ease of installation and repair in various pump applications. With a focus on durability and performance, this product ensures reliable sealing to help maintain the functionality of your pump system.