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. 40 Chain Number 1 Strand 34 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 BORE RANGE [MAX] 2 1/4 in BORE STYLE Minimum Bore PITCH DIAMETER [MIN] 5.420 in SPROCKET STYLE B LENGTH THROUGH BORE 1 in OUTSIDE DIA. 5.7000 in CHAIN PITCH 1/2 in CONSTRUCTION Welded HARDENED TEETH Without Hardened Teeth WIDTH ACROSS TEETH 0.28 in BORE RANGE [MIN] 5/8 in HUB DIA. 3 1/4 in NO. OF STRANDS ACROSS 1 MARTIN NO. 40B34 CHAIN NO. 40 NO. OF TEETH 34 KEYWAY No Keyway or Setscrew SERIES B INCH/METRIC Inch MATERIAL Steel PITCH DIAMETER 5.420 in HUB LENGTH THRU 0.716 in CALIPER DIAMETER 5.11 in OUTSIDE DIA. [MIN] 5.7000 in BORE TYPE Reborable WEIGHT 3.3 LB EAN OR UPC 697950006253