Power Tools
1pc 40 Teeth HTD 5M Timing Pulley Aluminium Synchronous Wheel For Belt Width 30/40mm Bore 5 6 8 10 12-30mm(20mm,40T/27mm(Belt 25mm))
Type: AF type Pitch: 5mm Number of teeth: 40 teeth Round hole: 5/6/6 35/8/10/12/12.7/14/15/16/17/18/19/20/22/24/25/28/30 mm
https://www.bizrate.co.uk/powertools/1pc-40-teeth-htd-5m-oid40313629609.html