AnyCubic Predator Silicone Sock

Edit:
Note 1: The use of a sock during bed levelling may be an issue if your probe does not fit tightly on its mount. There is not a lot of space between the back of the probe and the block. I test fitted my probe with the thicker walled sock and it fits snugly. However I can't guarantee that this will be the same on your printer. Be aware of this when you fit your probe for levelling.

Note 2: I have not tested how much clearance a sock allows when printing to the outside edges of the build