Got an older Coats 28mm shaft wheel balancer with old worn out cones and wing nut? Now you can upgrade to the industry standard 40mm shaft setup. This kit comes with everything you need to get started. Kit Contents: (1) 40mm x 4mm Pitch Conversion Shaft (1) Conversion Shaft Coupler (1) 40mm Wing / Hub Nut (1) Pressure Drum with Rubber Ring (4) Standard Balancer Cones (1.75" to 2.58", 2.44" to 3.06", 2.95" to 3.63", 3.375" to 5.25") (1) Spring Will Convert Over the Following Coats Balancers: 700, 800, 825, 850, 925, 950, 1000. 1025, 1050 And 1250