View cart “591-26A Air Valve Assy.” has been added to your cart. 591-42 Retaining Ring$3.50 591-42 Retaining Ring quantity Add to cart Category: TB591 Adhesive Spray Gun Description Description Replacement Retaining Clip Related products 591-02 Air Cap $29.95 Add to cart 591-05 Air Ring $5.50 Add to cart 591-41 Packing Screw $2.50 Add to cart 591-08 Side Port Control $12.95 Add to cart