Designed to complement the Kato Unitrack system, this structure also fits in easily on layouts using other brands of track. All are well-detailed and feature appropriately colored, injection-molded plastic pieces. Most are pre-assembled some are easy-to-assemble snap-together kits. Designed to complement the Kato Unitrack system, this structure also fits in easily on layouts using other brands of track. All are well-detailed and feature appropriately colored, injection-molded plastic pieces. Most are pre-assembled some are easy-to-assemble snap-together kits. Platform not included.