This is a ball spline from a new instrument. The full travel is 450mm. The drive end is 15mm diameter and the support end is the same. The timing pulley (this rotates with rotation of the spline) has a pitch of 2mm and there are 50 teeth. The item “THK Ball Spline with rotation pulley and RB2508UUCOS Bearing” is in sale since Saturday, March 11, 2017. This item is in the category “Business & Industrial\Automation, Motors & Drives\Linear Motion\Linear Bearings & Bushings”. The seller is “meeko1948″ and is located in Massachusetts. This item can be shipped worldwide.