HMS Hub 8 Spline Mercury (VS-55) are ridges or teeth on a drive shaft that fit grooves in a matching piece and transfer torque to it while maintaining angular alignment. It allows for a bit of length difference between the driving and driven units without causing damage to the output and input bearings. Key Features: For use in 1 11/64" I.D. hub cavity. Applications: Mercury 6-15 H.P. (Does not include Bigfoot Models). Composed of high-quality materials, light and reliable, high strength, anti-rust, sturdy and long-lasting. Ensures a perfect fit, form, and function for trouble-free use. Designed and developed for use in maritime applications. Rigorous quality you can trust. It is a cost-effective alternative that offers original equipment quality at a low price. Tested and validated throughout the manufacturing process for superior dependability to fulfill your quality standards. It replaces products VS-55, VS55, 827598T, 827598. Specifications: SKU: VS-55 UPC: VS-55 Weight: 0.15 LBS Brand: HMS Hub Drive Type: 8 spline Hub Type: Rubber Spindle length: 2.191" (~2 3/16") Rubber O.D.: 1.455" Max. Inside Dia.: 0.588" Uses Wear Ring: None Rubber Duro: 60 VS-55Spindle length: 2.191" (~2 3/16")Flange Dia.: **Rubber O.D.: 1.455"Max. Inside Dia.: 0.588"Uses Wear Ring: noneRubber Duro: 60Spline count: 8 spline