PTO Splined Coupling - Female Spline 1 3/4'' - 6 with - Sparex Part S.15732PTO Splined Coupling Female spline 1 3 4'' 6 with S. 15732 This Sparex Standard Duty PTO Splined Coupling is designed for applications up to 70HP. It features a 1 3 4" female spline with 6 splines, a length of 3 3 4" (95mm), and an outside diameter of 2 23 64" (60mm). Product Specifications Brand: Sparex Duty: Standard Female spline (ins): 1 3 4 Horse Power: up to 70 Length (ins): 3 3 4 Length (mm): 95 Number of female splines: 6 Outside diameter