Brand: Hammond Item: Subpanel For Use With: 24x20 (HxW) 1418xxxx, 1447SBxxHK, C3R24208HCR and HW2420xxxxHK enclosures Material: 5052-H32 aluminum Height: 21in Thickness: 12 gauge Width: 17in Perforations accept self-tapping screws for mounting lightweight components: No Hammond subpanel, 5052-H32 aluminum. For use with 24x20 (HxW) 1418xxxx, 1447SBxxHK, C3R24208HCR and HW2420xxxxHK enclosures.