HydroQuip R2E4ZVL-0500HE6 Control, Hydro-Quip Silver-B, 115v/230v, Less Heat, Box OnlyThe Lite Leader™ replacement is now available! The Silver-B replaces Lite Leader™ units with a stronger warranty - 2-years administered by Horizon! The Lite Leader™ unit originally came in three different configurations - this unit is a drop-in replacement for all of them The Lite Leader™ unit originally came with exposed electrical connections on an open pressure switch - the Silver-B has an enclosed pressure switch that plugs directly into the control box. Control Box Dimensions Height Width Depth