This is a Snowbird Nose Ski (826) by Dubro.
FEATURES:
Torsion Bar Design Easily mounts on airplanes with Dural or Wire Landing Gear in about an hour. High density Black Polyethelene Pre-Molded Runners Ideal for .60 Size Airplanes
YOU WILL RECEIVE:
One Ski One Torsion Wire One Torsion Wire Mounting Block Two 4-40x3/8" bolt Two #4 lock washers Requires Mounting Hardware and tools
SPECIFICATIONS:
length: 228.6 mm (9") width: 63.5 mm (2.5") Wire diameter: 3.2 mm (0.125")