Maxitrol REDR325C Red Spring 10-22 1/2" NPT Regulator 325-3 Series

Maxitrol R5210-38 Pink Spring for RV52 and R500 Regulators

Maxitrol R5210-13 Spring for RV52 & R500 Regulators Brown

Maxitrol Gas Pressure Regulator Spring 10-22" WC Red RV81 & 210D R8110-0122

Maxitrol R5210-25 2-5 Inch Plated Spring for RV52 and R500 Series

Maxitrol R400B10-1022 10-22 Red Spring For R400 Series

Maxitrol R5210-412 Violet Spring For RV52 R500 R500S

Maxitrol R5210-512 Blue Spring for RV52, R500, R500S Regulators