The GLH3000-SG is the latest ski developed by Airglas for the Sub 3000 lb airplane market. It uses composite/carbon fiber construction to make a hydraulic wheel ski that has excellent performance both on the snow and on hard surfaces. The ski provides a larger surface area on the snow than its competitors, yet is lighter and less expensive. STC’d for C-170,C-170A, C-170B,C-180, C-180A, C-180B, C-180C,C-180D, C180E, C-180F, C-180G, C-180H, C-180J, C-180K