Up for sale is a 2 count lot of used, sold as pictured, (plastic ends on motor are broke which attached to the ball screw) un tested and will be sold in working condition featuring a 2 count lot of THK Linear Ball Screw Actuators and stepper motors.  Part number for the ball screw is FK8.  Stepper motors are marked Sela which is a microscope.  See pictures for details and add 18.00 for shipping within the continental USA not including Alaska, Canada, Mexico, HI, PR or any out of country shipments.  Extra charges apply.  Call with any questions at 8472175546.  Sale comes with a 30 day inspection period and ror.