Brand New 1 3/8" PTO 21 Splined Coupler 3 3/4" Long Go to amazon.com Related posts Where to find pto pin long? DescriptionOne New Aftermarket Replacement Universal PTO Splined Coupler that fits several makes and models. 21 Internal Splines. 1 3/8" Female Spline. 3 3/4" Overall Length. Replaces Part Number: RAP15731
