The basics The replacement needle for Iwata HP TH H5. The benefits An airbrush is only a true Iwata when it contains genuine Iwata parts. To keep your airbrush operating at peak performance, make sure the model number on the side of your airbrush is listed below. FOR USE WITH:Hi-Line:HP-TH The uses Iwata Needles are made from stainless spring-steel increasing durability and have an ultra-smooth taper which creates optimal paint flow around the needle. The bottom line Iwata parts are precision crafted on the industry's most sophisticated machinery using the finest materials for consistent quality and performance. Every batch, every time.