These files are an entry to this contest; https://community.ultimaker.com/topic/23246-architect-design-contest-vehicles/?tab=comments#comment-211645 if you look at the file names, the truck types are; FLT -2T ; 2 ton : electro forklift FLT-4T-gas ; 4Ton Gas powered forklift FLT_10T ; 10Ton diesel forklift NAT ; narrow aisle truck (man up) RT ; 1.6 ton Reachtruck OPT: orderpicktruck with 3 rolcages Tow ; Towtruck