5 pairs (10), 1 runner ball bearing drawer guide, 1 extension, for 17 mm grooves, 10 kg, for drawers, deep design 246-412 mm, 246 mm L1, L2, 246 mm AV 80 mm through two ball cages, drawer drawer guide, steel galvanised set, suitable for most brands cabinet. ets.MFI, Ikea, Argos, Homebase, John Lewis, Hygena, B Q & and many more companies. These runners for hanging inside a groove half way down the side of your drawer, width 17 mm wide. To groove is to close the required size of the table runner and measure this length. This does not have an exact match only as long as the runner is shorter than your cabinet. The more runner, the better opening of the drawer. The extension is precisely specified and will not be as information of a critical dimension. Length of the runner if complete open.