View cart “591-26A Air Valve Assy.” has been added to your cart. 591-09 O Ring$4.50 591-09 O Ring quantity Add to cart Category: TB591 Adhesive Spray Gun Description Description Replacement “O” Ring Related products 591-05 Air Ring $5.50 Add to cart 591-01-1 Air Cap Clip $2.95 Add to cart 591-32 Air Connector $9.95 Add to cart 591-14A Air Bushing Assy. $36.95 Add to cart