This is an ER32 collet rack. It was designed with 1.5" vertical screw spacing to attach to 80/20 brand 3034-lite rail with 5/16" screws.
The model should import in the correct orientation and has been optimized to give best results printed in this orientation. Your slicers auto-supports function should generate the supports needed.
For best results, linear supports and a raft should be used.
The author marked this model as their own original creation.