Metcalfe PO240 Double Track Red Brick Viaduct for OO Scale. This is a card kit with an overall size of 735 x 100 x 132mm. It features a large two-track viaduct with end walls, designed to run into embankments or connect with additional kits for extended or elevated layouts. The kit includes extra brick pieces for wing walls and other detailing. Warning: Not suitable for children under 36 months.