CONVERTS OLD FIRESTONE PIN-LOCK PLUG TANKS TO BALL-LOCK PLUG TANKS or REPLACEMENTS TO ALREADY CONVERTED TANKS Works with Firestone models: A or R (gas & liquid plugs) Works with John Wood models: RA or RC (gas & liquid plugs) Does NOT work with Firestone model: CHALLENGER CHALLENGER V or VI SUPER CHALLENGER Does NOT work with John Wood model: 85 • Set includes: Two ball-lock plugs with o-rings two universal poppets two replacement o-rings for tank nipples • Manufactured from 304 grade stainless steel NOTE: NOT ALL FIRESTONE/JOHN WOOD PLUGS ARE 9/16”-18 THREAD DESIGNATION – PLEASE REFER TO OUR CATALOG FOR DETAILS NOTE: ALSO WORKS WITH A.E.B. AND CORNELIUS PRODUCT TANKS (19/32”-18 THREAD DESIGNATION)