Telescopic height adjustment system easily adjusts the height from 243 to 305cm (8ft to 10ft) in 15.24cm (6in) increments. Adjusts in seconds without the use of tools. 5 height settings. Suitable for 6 years and over. Rim of solid steel 15in x 12mm. Base, 29.5l fills with sand or water for stability. Size (H)305, (W)76, (D)65cm.