Maxitrol BLU R5310 5-12 Blue Spring For RV53 / R600 Regulators

Maxitrol R325C10-412 4-12 W.C Violet Spring For 325-3 Regulators

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

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

Maxitrol VIO R325E 1/2" Regulator Violet Spring 325-5 Series NPT

Maxitrol R500S Spring Gas Pressure Regulator

Maxitrol R8110-515 Spring for Rv81 and 210D Regulator Green 5-15 W.C

Maxitrol R5210-38 Pink Spring for RV52 and R500 Regulators