Durable Concrete Mixer Spline Shaft And Shaft Sleeve Concrete Mixer Spline Shaft This spline shaft sleeve is suitable for new or old mixer such as 1.5 square, 2 square, 3 square, 4 square, 4.5 square etc. It is suitable for M305, M306, M307, M309, M310, M311, M313 reducer spare parts.The spline shaft sleeve is installed between the reduction box and the main shaft which can connect the transmission transition of  Milling, CNC turning, Grinding, Wire cutting, EDM,Drilling, etc. CertificationISO9001, 2008 / ISO9001, CEDurable Concrete Mixer Spline Shaft And Shaft Sleeve website:http://www.hwm-parts.com/concrete-mixer-spare-parts/concrete-mixer-spline-shaft-and-shaft-sleeve/