Made in USA! One (1) O-Ring seal kit for the Crosman Pumpmaster model 760 auto cocking, (prior to 1977) .177 cal. pump rifle. Material：Urethane offers superior strength, tear and abrasion resistance. Our O Rings are handled by USPS Ground Advantage in a box with tracking number, not in an envelope that can be damaged by postal equipment, delaying your order or losing your o rings. O-ring kit to freshen up your Crosman 760 made prior to July 1975. TUNE-UP Valve ORING KIT for Crosman 760 Pre-July1975 Series Air Rifle Oring kit to freshen up your Crosman 760 made prior to July 1975. Oring that resides at the Inner Valve Body threaded are between the halves of the valve main. Oring that resides at the Outer Valve Body "nose" of the valve. Oring that resides at the Outer Exhaust Valve Cap. Quad Ring ("X-Ring") that is located inside the Exhaust Valve Cap.