This low-profile spacer is specifically designed for mounting thermal bed MOSFET circuit boards to flat surfaces, while also providing a certain amount of movement space for the leads. The spacer is suitable for MOSFETs with a 60×50 mm PCB and a 52×42 mm mounting hole spacing. The diameter of the mounting holes at each corner is 3 mm, and it is equipped with countersunk holes. The spacer has two flat areas on both sides, which can be fixed with screws or installed using double-sided tape.

The circuit board I'm using is this one.https://www.amazon.co.uk/gp/product/B06W5RJ9LY)，based on the HA210N06 MOSFET. This circuit board is widely sold on the market under various brand names, with a price range of about $10 to $40. Therefore, it is recommended to compare prices and shop around for the best deal.