Check the listing for details. Central Pneumatic Harbor Freight 04041 Framing Air Nail Gun O-Ring. Color: White, Condition: New. Listed at 3.99 USD. Did you know? Internal leaks are the most common cause of nail gun poor performance. Don't throw away your expensive tool before you try this cheap fix first! This o-ring is designed to fit and perform in Central Pneumatic (Harbor Freight) 04041 Contractor Series and may fit similar model nail guns. This is a hard plastic, like the OEM material. Please see the exploded view for location of this item. 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 degree 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 Husky deck home construction remodel tools carpentry contractor industrial DIY woodworking concrete cement masonry framing roofing finish finishing brad trim