Press Ring Product Type Rings Compatible Fitting System AnvilPress Elkhart ApolloPress Streamline PRS Viega ProPress Compatible Material Type Copper (Plumbing) Stainless Steel Compatible Pipe Size 4 in Kit Pipe or Tubing Sizes Included Not Applicable Material Steel Compatible Press Tool Type Extended Standard Compatible Tool Grainger Part Number 53AY74 53AY75 53AY93 53AY94 Compatible Tool Manufacturer Part Number 2773-20L 2922-20 Manufacturer Warranty Length 2 yr