This is an TT scale kit for a pair of Alco Dummy Tri-Mount Trucks. The kit includes 2 dummy trucks and 2 bolster pins.
The trucks have been designed for an over all wheel set axel length of 18.72mm.
This kit is only printable in the Fine Detail Plastic materials, except for the dummy chassis, and will require cleaning before painting. I recommend washing with warm soapy water then soaking in 'Goo Gone' or similar product for about 24 hours. Then rinsing off with warm water and allowing to dry.
For more information please see my blog - www.jamestrainparts.wordpress.com