Walthers Cornerstone 933-4100 HO Brick Kilns 2-Pack KIT NIBWalthers Cornerstone 933 4100 HO Brick Kilns 2 Pack KIT NIB Bring a classic industry to your HO layout with the Cornerstone Brickworks Series. Typical of facilities producing brick and similar products from the 1880s to the 1990s, the series includes four authentic structure kits, sized to model a complete operation on most layouts as well as accessories. One of the signature structures of any brickworks, the Cornerstone Brick Kilns feature: Based on