This is a brand new four-hole spool pin thread guide replacement for industrial sewing machines. It is a Singer Part # 202412-4 with a length of approximately 2 1/2 inches and a thread diameter of about 3/16 inches.
Fits Singer models: 107G, 107W, 108K, 108W, 111G, 111W, 211W, 112W, 136W, 140W, 143W, 144W, 145W, 151W, 151K, 151W, 153K, 153W, 168G, 168W, 236G, 236W, 307G, 457G, 457U, 46W, 47W, 51W, 52K, 52W, 61W