Hyperion 400-Class Aluminum Landing Gear with Curved Legs. These are the same as in the Extra 300 kits, made of springy aluminum. Use as replacements for the Extra 300L, or to fit almost any model in the 300 to 480 class, or for your own hand-built models. Weight: 30.9g, Width: 210mm (between axle holes), Height: 95mm (to axle holes). Includes two wheels (40mmx11mm, 2.4g), mounting hardware as pictured, and two aluminum wheel collars not shown. Hyperion