“591-31A Air Inlet Assy.” has been added to your cart. View cart 591-09 O Ring$4.50 591-09 O Ring quantity Add to cart Category: TB591 Adhesive Spray Gun Description Description Replacement “O” Ring Related products 591-24A Replacement Needle Bushing Assembly $29.95 Add to cart 591-44 Stud $3.50 Add to cart 591-14A Air Bushing Assy. $36.95 Add to cart 591-07 Platen $14.50 Add to cart