Double-Track Railroad Bridge Concrete Abutment pkg(2) -- Kit - 11-1/4 x 3-1/4 x 5-1/4" 28.6 x 8.3 x 13.3cm. The Cornerstone HO Scale Double-Track Railroad Bridge Concrete Abutment kit includes two concrete abutments with wing walls. - Model Trains, HO Scale, HO Scale Layout Items