My first thing upload, hope I get it right. It is a quick spool holder for the CTC 3D printer, I believe they are based on the makerbot (im new to the whole printing thing) It uses the original spool holders that are mounted on the back of the printer, I bolted them to the front of the printer, I needed something quick, hope its of some use, seems to work very well.Printed in PLA, 3 walls, 10% fill, nothing special.