This listing is for:

Two (2) complete urethane O-Ring seal kits,
for Crosman models MK-I & MK-II, in .177 cal. & .22 cal.    

Enough seals to rebuild two (2) MK's in any caliber
combination.

Ten (10) seals are included in this double kit:

Two (2) piercing body, urethane o-ring seals.
Two (2) piercing pin, urethane o-ring seals.
Two (2) .22 cal. breach bolt, urethane o-ring seals.
Two (2) .177 cal. breach bolt, urethane o-ring seals.
Two (2) valve body, urethane o-ring seals.

Urethane offers superior strength, tear and
abrasion resistance.

Included in this sale is a printed copy of an
exploded view showing seal locations, their
part numbers, and the E-Z seal ID guide.

This is Version #2, showing the latest model
with a push button piercing cap.