This is a Red-White-Blue Foam Blade Holder for the Concept 30 or / Any Other 30 Size Helicopter on the Market. / / FEATURES: Fits snugly onto the tail boom and then the blades slide into it / to keep them firmly in place. / / INCLUDES: One .30 Size Blade Holder / / SPECS: Has 2 slots about 2½" Wide for the Blades / Width: 3½" / Height: 6¼" / Thickness: ¾" / ir/jl