View cart “591-26A Air Valve Assy.” has been added to your cart. 591-40 Packing$3.50 591-40 Packing quantity Add to cart Category: TB591 Adhesive Spray Gun Description Description Replacement Needle Packing Related products 591-41 Packing Screw $2.50 Add to cart 591-09 O Ring $4.50 Add to cart 591-43 Trigger $6.50 Add to cart 591-05 Air Ring $5.50 Add to cart