View cart “591-42 Retaining Ring” has been added to your cart. 591-31A Air Inlet Assy.$9.95 591-31A Air Inlet Assy. quantity Add to cart Category: TB591 Adhesive Spray Gun Description Description Replacement Air Inlet Assembly Related products 591-26A Air Valve Assy. $19.95 Add to cart 591-44 Stud $3.50 Add to cart 591-40 Packing $3.50 Add to cart 591-03 Fluid Nozzle $29.95 Add to cart