Designed for MX5's but will fit other cars with m10 threads.
5mm thick - many aftermarket poly bush mounts have longer threads so more than one can be stacked to give even more room
Simply loosen your engine mounts, raise the engine with a crane or jack and slide these between the mounts and subframe to raise your sump safely away from the ground. (Don't forget to tighten your mounts back up again!)
Then this allows you to lower your car to a suitable degree and stop being a vegan.