MR-501B JB Industries Blue Nylon Handwheel
Red plastic handwheel and screw used on JB M2 and M4 series manifolds.
Set of two hand wheel screws for use on all JB manifolds.
Piston with seat and o-rings for use in all JB manifold models except zeppelin four valve models (use MR605).
Set of metal handwheel and screw for use on JB manifolds, M5 through M9 series by JB (MR-508). Can be used on any 1/4" stem or valve.
Set of two o-rings for use on 2-valve zeppelin and M2 through M9 JB series manifold models.
Stem and nut for use on JB M3 older series manifolds.