Guide Rail System, Material Cast Iron, For Use With 12T645 to 12T652, Overall Height 36 in, Overall Width 22 in, Requires (2) 2 in Guide Rails, SS Recommended. Lifting Chains and Bails Ordered Separately, Includes Base, Adapter, Bolts, Fittings and Upper Guide Rail Positioning Bracket, Pump Discharge 2-1/2 in Flange, Rail System Discharge 3 in Flange