The 114 mm (4-1/2") diameter pad lifts up to 66 lbs. (30 kg), making it, for its weight, one of the highest capacity lifters available. The pad will adhere to any smooth, non-porous surface such as glass, mirror, steel, aluminium, laminates, and plastics. Its durable metal construction and hard coating makes it tough enough for everyday use. A simple, reliable, easy-to-use vacuum lifter.