From old stock. Had some rust and staining and I cleaned it up a bit. Has never been on a machine.Buyer will receive the sprocket shown. SPECIFICATIONS NO. OF STRANDS ACROSS 1 SERIES B CONSTRUCTION Solid CHAIN PITCH 0.500 in OUTSIDE DIA. 4.1000 in MARTIN NO. 40B24 NO. OF TEETH 24 HARDENED TEETH Without Hardened Teeth BORE TYPE Minimum Plain Bore KEYWAY No Keyway or Setscrew MATERIAL Steel SPROCKET STYLE B LENGTH THROUGH BORE 1 in PITCH DIAMETER [MIN] 3.830 in CHAIN NO. 40 CALIPER DIAMETER 3.52 in WIDTH ACROSS TEETH 0.28 in PITCH DIAMETER 3.830 in BORE RANGE [MAX] 2 1/4 in STOCK BORE SIZE 0.625 in HUB LENGTH THRU 0.716 in INCH/METRIC Inch HUB DIA. 3 1/4 in OUTSIDE DIA. [MIN] 4.1000 in BORE STYLE Minimum Bore BORE RANGE [MIN] 5/8 in WEIGHT 2.41 LB EAN OR UPC 697950005485