This is the SpeedTek RC 5mm to 1/8" Reducer Sleeves (2). These aluminum sleeve will allow you to use 5mm bore pinion gears on motors that have an 1/8" shaft.
SpeedTek RC 5mm To 3.17mm Aluminum Reducer Sleeves (2) (5mm To 1/8")
SKU: SPV-0010-B
$6.65 Regular Price
$5.99Sale Price