Pop Up Blade Stops and Pin Stops fit between conveyor rollers and extend above the top of roller to stop products. While Blade Stops are used for boxes or pallets, Pin Stops are for round products such as barrels, pails, or tires. Pop Up Stops are typically pneumatic and control product flow by releasing one unit at a time. These stops are mounted within straight conveyor sections. Optional equipment includes limit switches for up/down positioning and pneumatic valves.