View cart “591-39 Fluid Connector” 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 591-01-1 Air Cap Clip $2.95 Add to cart 591-41 Packing Screw $2.50 Add to cart 591-44 Stud $3.50 Add to cart 591-14A Air Bushing Assy. $36.95 Add to cart