View cart “591-20 Needle” has been added to your cart. 591-26A Air Valve Assy.$19.95 591-26A Air Valve Assy. quantity Add to cart Category: TB591 Adhesive Spray Gun Description Description Replacement Air Valve Assembly Related products 591-14A Air Bushing Assy. $36.95 Add to cart 591-24A Replacement Needle Bushing Assembly $29.95 Add to cart 591-03 Fluid Nozzle $29.95 Add to cart 591-05 Air Ring $5.50 Add to cart