1. Diameter of each pad is 200mm. 2. It is main for leveling the 2 pieces of slabs and get them closely when in installing 3. Includes two vacuum hand cups and removable ratchet 4. Dual hand cup with ratchet for pulling and aligning of work-pieces in assembly work, designed to pull two flat surfaces or seams together, for marble and granite, flooring mirrors, glass, plastic. or any situation in which flat, non-porous surfaces need to be pulled together. 5. Hand cups can be used by easily removing the connecting ratchet assembly easily changes in seconds. Welcome and I wish you a happy life, my friend., Manufacturer: DCDCD