25 x Black Cable CleatsCleat Internal Diameter - 17.8mm (Size Number 7)Screw Fixing Hole - 6mm Internal DiameterOther - Manufactured From Black LDPECan be used with - These cleats are usually used for fixing 'steel wired armoured (SWA) cable' to a wall or other surface. They can be used with other cable types too, simply check the diameter of your cable and compare with the 'cleat internal diameter' stated above. We have the following quantities & sizes available in our shop;Pack Quantities - 100, 50, 25Sizes;7.6mm (Size 3), 12.7mm (Size 5), 17.8mm (Size 7), 22.8mm (Size 9)