Specification Brand : Martin Label : Martin Manufacturer : Martin NumberOfItems : 1 PartNumber : 50BS12 7/8 ProductGroup : BISS Basic ProductTypeName : ELECTRONIC_COMPONENT Publisher : Martin SmallImage_Height : 56 SmallImage_URL : https://m.media-amazon.com/images/I/51S53HF836L._SL75_.jpg SmallImage_Width : 75 Studio : Martin Title : Martin 50BS12 Bore To Size Sprocket 7/8"