Discounted Anest Iwata WS-400 Series 2 Base Digital Spray Gun Eco Set (Supernova Replacement) 1.3 OBS GUN ONLYDiscounted Anest Iwata WS 400 Series 2 Base Digital Spray Gun Eco Set (Supernova Replacement) 1. 3 OBS GUN ONLY Discounted due to having only the gun in the box, not the FFS cups. This is the 1. 3 OBS version of the gun. OBS nozzle settings. OBS stands for Optimum Basecoat Settings, and the range is designed for basecoat applications in different climates and conditions; the OBS nozzles have been re engineered with a long flat spray pattern, but with