Max. weight lifting capacity: 10kg. Diameter: 75mm.Lightweight frame made from high density aluminium. Made from durable rubber.Handy release lever for quick release.Can also be used to assist in glass panel installation by preventing the glass dropping down the channel.Larger sized panel cups available, please see Power-TEC Part Nos. 91174 (100mm diameter), 91175 (125mm diameter). Full set of all 3 sizes available, please see Pwer-TEC Part No. 91938.