Fast Shipping Quick, Simple Ordering Clear, Upfront Pricing Over 30,000 Happy Customers Exceptional Customer Service Industry's Largest Catalog product description Needle Valve Stem for Gilson Concrete Air Meter This precision-engineered Needle Valve Stem is a crucial replacement part for the Gilson Type B Air Meter's pressure chamber. Designed for accurate control, it ensures reliable and consistent performance for your concrete air content testing.