It is computerized length stop which helps to cut the profiles precisely in the required measurements. SKN 300 Roller Conveyor 3.0 meter, Computerized, ±0.2 mm Positioning Accuracy, L 3000 x W 250 mm SKN 600 Roller Conveyor 6.0 meter, Computerized, ±0.2 mm Positioning Accuracy, L 6000 x W 250 mm