10mm x 24" Square Bass Multi Rotor Arms. Compatible with all Radical RC Multi Rotor Kits. Please note, the nature of wood is it's "natural" and it's generally less straight than the various tubing options. Much cheaper and certainly very easy to repair or modify. Accepts fasteners readily. Lots of postive aspects to flying woody arms. Price is per stick. Custom machined for 10mm Multi-Rotor application.