Hyperion 400-Class Aluminum Landing Gear with Straight Legs. These are the same as in the Hyperion SU-31 Sukhoi kits, made of springy aluminum. Use as replacements for the SU-31, or to fit almost any model in the 300 to 480 class, or for your own hand-built models. Weight: 26.9g. Width: 202mm (between axle holes). Height: 90mm (to axle holes). Includes two wheels (40mmx11mm, 2.4g) mounting hardware as pictured AND two aluminum wheel collars not shown. Hyperion