A riser to put Elegoo Mini Heater in Elegoo Mars 4. You also need a lid riser to let the power cable out: https://www.printables.com/model/710358-elegoo-mars-4-ultra-resin-printer-cover-riser

as well as a 90 degree angle adapter for the power cable like this: https://www.amazon.com/dp/B0819B5SKT?ref=ppx_yo2ov_dt_b_fed_asin_title