Milton 440-5 5 1/2" Truck Valve Extension - Box of 10 Nickel plated brass, long skirt, high heat cap, all threads.305-32 Truck valve extension, For use with trucks or buses to extend existing tire valve 5 1/2" effective length, Thread size.305-32, Hi-heat cap, Nickel plated Brass Nickel plated brass, long skirt, high heat cap, all threads .305-32 Truck valve extension, For use with trucks or buses to extend existing tire valve 5 1/2" effective length, Thread size .305-32, Hi-heat cap, Nickel plated Brass