View cart “591-26A Air Valve Assy.” 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 591-43 Trigger $6.50 Add to cart 591-01 Retaining Ring $14.95 Add to cart 591-23 Replacement Fluid Needle Spring $5.95 Add to cart 591-06 Lock Screw $12.50 Add to cart