View cart “591-41 Packing Screw” 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 591-40 Packing $3.50 Add to cart 591-26A Air Valve Assy. $19.95 Add to cart 591-05 Air Ring $5.50 Add to cart 591-01 Retaining Ring $14.95 Add to cart