Product Introduction Introducing the Trailer Chassis to be attached to the Z Shorty series vehicles. SA004-1 has a bogie shape of the Shinkansen type used for Shinkansen vehicles. Minimum curve radius R45 Arnold coupler long x 2 pre-installed Bogie shape: Shinkansen type Rokuhan Z Shorty Features 1/220 scale ultra-miniature railway model Z Shorty is a railway model that deforms the length of Z gauge vehicles to about half the size.