1. Tips: Vyperr has 4 versions, Vyper B, Vyper C, Vyper D, Vyper E version. But the screw holes of Vyper B, C, D versions are smooth, without threads. The Vyper E version and the Kobra4max series have threaded screw holes. So before , please confirm the screw holes of your bearing. Use: If the hot end mounting block and induction strain gauge from an Vyperr model age, fail or do not work properly, it is a perfect replacement accessory for 3D printers. 2. Points to note: Do not turn over the wire in the welding area, otherwise it will easily lead to the failure of the induction function. 3. Easy to replace: The main function of this strain gauge sensor replacement part is to fix the hot end and level automatically, and it must work with the main board of the original model. 4. High quality: High quality raw materials, good workmanship. Environmentally friendly, and non hazardous.