View cart “591-26A Air Valve Assy.” has been added to your cart. 591-23 Replacement Fluid Needle Spring$5.95 591-23 Replacement Fluid Needle Spring quantity Add to cart Category: TB591 Adhesive Spray Gun Description Description Replacement Fluid Needle Spring Related products 591-07 Platen $14.50 Add to cart 591-43 Trigger $6.50 Add to cart 591-01 Retaining Ring $14.95 Add to cart 591-08 Side Port Control $12.95 Add to cart