uxcell F450 DIY RC Quadcopter Multicopter Rack Frame Kit w KK MK MWC Product Name : F450 Rack Frame Kit;Model No. : F450 Arm Size : 21.5 x 4 x 5.5cm/8.5" x 1.6" x 2.2"(L*W*H);PCB Board Size : Top Board:10.8 x 10.8cm/4.25" x 4.25"(L*W)Bottom Board: 18 x 11.6cm/7.1" x 4.6"(L*W) Screws Size : M2.5x6; M3x8;Materials : PCB, Plastic Main Color : White, Black, Red;Net Weight` : 240g Package Content : 1 x Top Board;1 x Bottom Board;4 x Arms;Some Install Screws;1 x Install Manual