Top and Bottom Track Length: 3000 mm Track Width x Height: 17.5 x 7.75 mm Maximum Door Weight: 50 kg features: High quality bottom rolling sliding door system for straight sliding timber doors. Kit complete with track and fittings for three doors If four doors required, add extra single door accessory pack code: 18178 see related items For domestic or medium duty commercial furniture Minimum door thickness 16 mm Minimum gap between doors 7 mm Identical top and bottom track Top and bottom guides can be surface fixed or morticed into the back face of the door so concealed when fitted Top guides are spring loaded for ease of door installation or removal Bottom rollers c/w ball bearings and with vertical adjustment +/- 4 mm with roller in installed position Braking plate holds door in fully closed position Aluminium and black plastic