Drive Shaft Spacer Type 4 Custom For Lower Left 5m Belt Shaft Sprocket when using 2 left side shaft bearings only! Some models/frames only benefit from extra left side bearing when primary bearing fails. most models can carry 2 left bearings. call if need be. Fits many scooters if driveshaft bearing dwellin frame is exact same size for entire bore & is for custom improved application only! not stock! This spacer goes between lower left side pulley and left side drive shaft bearings x 2! Or between two left bearings on Cobra. This is for custom application only. Call before ordering! This spacer is only used when installing 2 left side bearings for which some frames don't retain the 2nd left side bearing. Call and we will explain. 256.468.2761 This is an improved spacer that is made in usa. Specs:ID-480/1000ths, OD-750/1000ths, 400 thousandths long. use of type 3 spacer for this extra bearing setup is more common.