.auto-style1 { font-family: serif; } FSA  BMX SPROCKET SPACER SPECIFICATIONS: part #: 540-9910 for use with chainrings with a diameter of 24mm diameter and 19mm crankset spindles center inner diameter: 19mm outside diameter, center: 24mm height of 19.0mm section: 4mm total width: 6.5mm material: steel color: black condition: new