The M-231 Forward Strut bushing welds into the bottom of the foward strut. 1 bushing required for each forward strut. To be used in alcohol non-top fuel style wingstand applications! The bushing is made from 3/4" RD 4130 steel and measures 3/8" I.D., 3/4" O.D., and length is 1 1/8". There is a pdf chart that can 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.