Banner Engineering SLC4P24-160P44 Safety Light Curtains SLC4 Type 4 Safety Light Curtain, Pair; Resolution: 24 mm; Response (Tr): 6.5 ms; Range: 0.1 to 2 m (4 in to 6.5 ft); Height: 160 mm (6.3 in); 300 mm (1 ft) 4-pin M12 Pigtail QD; Mounting Hardware Ordered Separately