This is the DuBro Snowbird Snow Ski in Blue for Model Airplane Nose Gear. FEATURES: Mounts on airplanes with dural or wire landing gear Fits up to .60 size airplanes High density polyethelene, blue in color Runner molded on bottom for better tracking INCLUDES: Nose Gear Snow Ski in Blue with Spring and Mounting Hardware SPECS: Length: 9.3" (236mm) Width: 2.6" (65.6mm) jxs 11/23/11 ir/jxs