1 1/2 Tubeless tire valve fits rim hole diameter of .453. Standard rubber replacement valve is the snap in type with a cap thread size of .305-32. Maximum cold inflation pressure of 60 PSI. TR # 414. Product Features:1 1/2 effective lengthMade of ozone resistant rubberMaximum cold inflation pressure may not exceed 60 pounds per square inchTire and rim type 414