View cart “591-31A Air Inlet Assy.” has been added to your cart. 591-08 Side Port Control$12.95 591-08 Side Port Control quantity Add to cart Category: TB591 Adhesive Spray Gun Description Description Replacement Side Port Control Related products 591-24A Replacement Needle Bushing Assembly $29.95 Add to cart 591-09 O Ring $4.50 Add to cart 591-43 Trigger $6.50 Add to cart 591-01 Retaining Ring $14.95 Add to cart