The M-19-B Motor Mount Spacer bushing is used to space the motor back 1". The bushing is made from 6061 aluminuml and measures 3/8" I.D., 1" O.D., and length is 1". There is a pdf chart that may be downloaded from our website, http://mckinneycorp.com/downloads/pdf/bushing.pdf, that will give you a list of some of the bushings that we carry. Should you not be able to find the bushing that you're looking for, call and we'll be happy to assist you in finding what you need.3/8" I.D., 1" O.D., 1" Long.