Halo 4 UNSC Warthog Key Chain by Crowded Coop With a canvas strap and screen printed graphics that feature the AMG Transport, the Halo 4 UNSC Warthog Key Chain makes for a great collectible! The key chain measures about 6-inches long x 1 3/ 10-inches wide. The Halo 4 UNSC Warthog Key Chain features a rubber molded UNSC logo and a military style carabiner. Ages 8 and up.