HB Maintenance Kit (100 Series) Consists of :
(1) stem seal spring
(1) guide bushing
(1) V-ring stem seals
(1) body gasket
(1) packing O-ring

HB Maintenance Kit (101 Series) Consists of :
(1) HB Maintenance Kit (100 Series; above)
(1) stem and plug assembly*

HB Complete Rebuild Kit (100 Series) Consists of :
(1) HB Maintenance Kit (100 Series; above)
(1) diaphragm
(1) stem O-ring
(1) yoke O-ring
(1) upper guide O-ring

HB Complete Rebuild Kit (101 Series) Consists of :
(1) HB Complete Rebuild Kit (100 Series;above)
(1) stem and plug assembly*

*Stem & Plug is a single piece unit.