View cart “591-20 Needle” 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 591-06 Lock Screw $12.50 Add to cart 591-43 Trigger $6.50 Add to cart 591-24A Replacement Needle Bushing Assembly $29.95 Add to cart 591-05 Air Ring $5.50 Add to cart