Specification Brand : Martin Label : Martin Manufacturer : Martin NumberOfItems : 1 PackageDimensions : L:9.05511810100 X W:7.08661416600 X H:6.29921259200 PartNumber : 40BTB18-1210 ProductGroup : BISS Basic ProductTypeName : ELECTRONIC_COMPONENT Publisher : Martin SmallImage_Height : 56 SmallImage_URL : https://m.media-amazon.com/images/I/4127KH1WMSL._SL75_.jpg SmallImage_Width : 75 Studio : Martin Title : Martin 40BTB18-1210 Bushed Taper Sprocket 18-Teeth 1/2 Pitch