This is an N scale set of Alco C-855 chassis extenders to convert two Con-Cor U50/Turbine chassis into a C-855 chassis. They are designed to be used with a James' Train Parts Alco C-855 locomotive kit.
These parts are designed to be printed in Stainless steel to keep the required weight in the chassis however they can also be printed in the cheeper FUD and WS&F materials. Please note the FUD and WS&F have not been tested.
If printed in the FUD material they 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