This raiser screws on to the side and bottom of the bed frame for security, and is especially recommended for modern bed bases. It consists of two coated screw plates linked by a telescopic steel tube to give easy bed width adjustment. Each leg is fitted with twin wheeled castors that are individually braked. Castor size 50mm (2"). Bed width 840 - 1372mm (33 - 54"). Height raise 110 - 310mm (4 1/4 - 12 ¼"). Weight 3.3kg each. Sold as a pair, one for each end of the bed. Max. total load: 50st / 318kg.