Boston Gear PLB5020DF09-1/4 Timing Pulley， 5 mm Pitch， 20 Grooves， 9mm Wide Belts， 0.250" Bore Diameter， 1.208" Outside Diameter， 0.813" Overall Length， Lexan with Aluminum Insert， Double Flange</br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/41q%2BfvjApmL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/41rGpfrAqlL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/41t1Yx5ku0L.jpg' noproxy></br>