Titan Pop-Up Transfers, Stops, Pallet Centering, Pallet Lifts and Pallet Crowders are designed for integration into Titan roller conveyor systems. Heavy duty construction with #50 roll-to-roll drive chain. (#60 chain optional.) Standard rollers are 2 1/2" diameter x #11 gauge or 2 5/8" diameter x #7 gauge. Standard roller centers are 5". Supports are 4" structural with adjustable feet.