Maxitrol R5210-38 Pink Spring for RV52 and R500 Regulators

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

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

Maxitrol R5210-48 Orange Spring for RV52, R500 and R500S Regulators

Maxitrol R5210-412 Violet Spring For RV52 R500 R500S

Maxitrol R5210-1022 Red Spring For R500 Replacement

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

Maxitrol R6110-13 Brown Spring for RV61 Regulators 1-3.5 WC