The "insulating tape" shown in the photo was added by the repairman to prevent the coil from rubbing against the rotor and keep the shape of the coil. General products do not have this tape fixing process. The coil that can't be removed (one end can be cut and pulled out from the other end), the number of turns (one wire is a turn), the wire diameter measurement, molding, winding, embedding, shaping, painting, drying, etc. For beginners, it's best to buy another one. It's much easier to buy a second-hand one than to change the coil. In addition, the enameled wire may not have a suitable wire diameter yet.