1.Size : 10-30cm 2.Max Loading Capacity:40lbs(18.1kgs) 3.Color: Black or Silver 4.Product G.W:2.24lbs (1.02kgs) HOT SALE!!! About Ceiling Mountings(CM717):1.Size : 10-30cm2.Loading Capacity:40lbs/PC (18.1kgs/pc)3.Color: Black or silver4. G.W:2.24lbs/PC (1.02kgs/PC)5. Super compatible (Compatible with more than 90% projectors),adjustable varied angle and extent. Ceiling mounts (Size: 10-30CM)