Zipp Kits 5mm-.150 Square drive coupler This can be used as a the replacement motor coupler for the 3.5 Hyperformance Bullet Drive Outboard leg and the hpi-eobckOS35-5mm, hpi-eobck35-5mm, Zip-3628 conversion kits. Specs: 5mm smooth bore for motor side..135 squared hole for .150 cable that has squared end.
