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 50 Chain Number 1 Strand 15 Teeth Without Hardened Teeth B Sprocket Style DESCRIPTION Maximum bores shown will accommodate standard keyseat and setscrew over keyseat. Slightly larger bores are possible with no keyseat, shallow keyseat, or setscrew at an angle to keyseat. FEATURES Tolerances meet or exceed ANSI standards Manufactured of high carbon steel Precise machining and processes ensure consistent finish and high quality Bores are concentric to pitch line, minimizing run out SPECIFICATIONS OUTSIDE DIA. 3.3200 in HUB DIA. 2.38 in CHAIN PITCH 5/8 in NO. OF STRANDS ACROSS 1 BORE STYLE Minimum Bore PITCH DIAMETER 3.010 in SPROCKET STYLE B BORE RANGE [MIN] 5/8 in CONSTRUCTION Solid SERIES B LENGTH THROUGH BORE 1 in HUB LENGTH THRU 0.657 in INCH/METRIC Inch NO. OF TEETH 15 BORE TYPE Reborable WIDTH ACROSS TEETH 0.34 in MARTIN NO. 50B15 HARDENED TEETH Without Hardened Teeth PITCH DIAMETER [MIN] 3.010 in MATERIAL Steel BORE RANGE [MAX] 1 1/2 in KEYWAY No Keyway or Setscrew CALIPER DIAMETER 2.59 in CHAIN NO. 50 OUTSIDE DIA. [MIN] 3.3200 in WEIGHT 1.34 LB EAN OR UPC 697950010380