This is a set of motor brush isolators to convert a Wrenn OO locomotive with a vertical motor to DCC.
The kit includes four motor isolators, only one is needed per locomotive.
This model has been designed for Smooth Fine Detail Plastic.
If printed in the FUD & FXD materials it will require cleaning before painting. I recommend washing with warm soapy water then soaking in 'Goo Gone' or a similar non-corrosive product for 24 hours. Then rinsing off with warm water and allowing to dry.
For more information please see my blog - www.jamestrainparts.com