Description PTO Splined Adapter for Tractors up to 75 PTO H.P. - 1 3/8", 21 spline female x 1 3/8", 6 spline male - Extends PTO 4 1/2". This item is a suitable alternative for the following: 442-3200373, 03-32-00373, 033200373, 264203-32-00373, 442-033200373