YO074B Mystery 450Pro metal tail boom. Brand: Mystery. Material: Metal. Specially designed for 450 helicopters. Light weight and easy to install. Weight: 16g. Great replacement parts for the old or broken ones.   Package Details Weight: 17.12 g Size: 34.5*1.2*1.2 cm Package Includes 1 × Mystery Metal 450PRO Tail Boom (Black)