IWATA 21012 WIDER2L-14G2P 1.4 Pressure PRS Spray GunErgonomic Design with the Focus on Functionality. In the course of applying an ergonomic design throughout, we also achieved a 5 g weight reduction. Every adjustment knob is tapered with deeper grooves, providing a surer grip for easier fine adjustments. We also built in a bushing into the back of the needle valve spring to make paint output adjustment smoother. The tip of the trigger has a smoother shape, for easier operation when applying lower