This is the glas part for a body kit for turning Hispatren's RENFE 333 into a first and second series DSB MZ locomotive (DSB MZ 1 and DSB MZ 2)
to make the model propper transparent it is recomended to sand it on the flat side and spray it with shiny clear coat
This is only the transparent plastic parts, you will also need some plastic parts for converting a class 333 to a clas MZ locomotive: these are the kits these windows are made to support
DSB MZ I and DSB MZ II