HobbyStar Electric Roto Starter Backplate For .28 Engines

Backplate for use with electric starter on .28 nitro engines.  This is a replacement for Redcat Racing/HSP part number 11012H12 and it fits many popular engines like the VERTEX CXP SH 28 ENGINE.  It has a 34mm bolt pattern (measured from one bolt hole to the other, and 44mm when measured diagonally) and a 12mm hex drive for the one-way bearing (one-way bearing is not included).