The solid rubber pad is firmly embedded in the sheet metal base and secured by a screw loctited into place. The threaded stud can be either adjusted via the internal hexagon at the top or the wrench flats at the lower end. To insure proper leveling mount size, divide the machine weight by the number of mounts required. This will equal the pounds or load per mount. The static load is limited by any deformation of the base. Black pad inlay (NBR) offers high resistance to swelling when in contact with oils and fuels.