LGB-20851-023 Red Lantern Lens (14/12 mm)

Smaller Red Lantern lens with outer Ø 14 mm and inner Ø 12 mm

this is the common size for the 2085 as well LGB Streamline observation cars 30590 

This lens is press fit into the lantern housing with the 12 mm side, and overlaps the housing with the outer ring.