Check the listing for details. Central Pneumatic Harbor Freight 47612 Framing Air Nail Gun Cylinder Seal. Color: White, Condition: New. Listed at 10.99 USD. Did you know? Cylinder seal failure is the most common cause of nail gun leaks and poor performance. Don't throw away your expensive tool before you try this cheap fix first! This cylinder seal (piston o-ring) is proven to fit and perform in Central Pneumatic (Harbor Freight) 47612 Contractor Series and may fit similar model nail guns. I've listed rough sizes in the product details and they're shown in the pictures. If you have any doubts, measure yours first! If you have something that's different than this, message me. I can duplicate it and create a listing for you. Check out my other listings for other models. Thanks for looking! keywords: framing nailer nail gun 18 21 28 30 repair gasket diy wood woodworking compressed air Wen Northern Paslode Craftsman Kobalt Metabo Milwaukee DeWalt Rigid Numaxx Makita Dotool Valu-air Stanley Ace Menards Lowes Home Depot 21 28 30 degree Husky deck home construction remodel tools carpentry contractor industrial DIY woodworking concrete cement masonry framing roofing finish finishing brad trim