Please note, this Em Tube does not come supplied with a kerb. If you require a kerb for this window, you must purchase this seperately. Description An innovative and effective means of transmitting natural daylight to poorly lit areas. Comprehensive range of sizes and accessories available. Provides up to 14 times more light (1500 lux) than a 100W bulb (105 lux). Suitable for shorter tube length. Fits to a builder's curb or can be supplied with the Em-Curb PVCu upstand to reduce installation time and provide a fully insulated unit. Features • Available in 'rigid' and 'flexible' tube systems. • Flat and pitched roof options available. • Up to 14 times more light than a 100W bulb. • Minimal disturbance to roof and ceiling construction. • Low profile polycarbonate UV resistant dome. • Easy to install. Application Suitable for very small rooms - up to 2m x 2m for the flexible tube system and 3m x 3m for the rigid tube system. Fits between most conventional rafters/joists - eliminating the need for trimming work.