VTR Valve Stem TR-618A For Lawn/Garden-Tractor Wheels Metal clamp-in type valves make filling with liquid ballast easy. By removing core housing, a large opening is provided for air or liquid fill. 625" valve hole. Vertical Height: 1 7/8" Perfect for tractor, grader and backhoe applications. NSN 2640005552825 For use in grader, agriculture, tractor, implement, and other industrial applications.