Three parts sprued togehter to create a non-power conductive cattle guard for between the rails. Consult your prototype for construction of wood or metal parts to transition to fencing. This part scales up the Sn3 part to 1:48 for On3 modelers. The rail will be about code 83, though the height may be reduced with some gentle sanding at the bottom of the part. The clear dimension across the outside faces of the inner part is 1/2" actual. Soak the fresh part in Bestene or acetone, prime, paint and install. This may also be used for a grade crossing.