Salt Plus Center Bolt Drive Sprocket 25t Black/Green Acid Drip Includes Adaptors for 19mm and 22mm Spindles Go to amazon.com Related posts Top recommendation for freewheel sprocket adapter Feature6061-T6 alloy, full cncIncludes 19mm & 22mm spindle adaptorsTooth Count:: 25teeth Description6061-T6 alloy, full cnc. Includes 19mm & 22mm spindle adaptors. Color:Black/Gold Acid Drip. Defined Color:Gold. Tooth Count:25teeth.