Tom from SWISCO responded:
November 10, 2011
Thanks for posting!
What you have looks very similar to our 23-189 Four Wheel Trolley. Please take a look at that and compare its dimensions to your sample to see how they match up. One important measurement to know is the distance from screw hole center to screw hole center. Also take a look at our 23-161 4 Wheel Pocket Door Carrier. |