Maxitrol R5210-38 Pink Spring for RV52 and R500 Regulators

Maxitrol R5210-13 Spring for RV52 & R500 Regulators Brown

Maxitrol R5210-412 Violet Spring For RV52 R500 R500S

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

MAXITROL RV52 (1/2) Gas Pressure Regulator,1/2" Pipe Size

Maxitrol R400B10-25 2-5 Plated Spring for R400

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

Maxitrol R5310-25 Plated 2-5 Spring for RV53 Regulators