GAP 4-1002 Channel 4/2 Switch/Shutter Multi-Actuator, Manual 10A. MDRC GAP 4-1001 4/2 Channel Switch/Shutter Multi-Actuator, 10A. MDRC GAP 12-1602 Channel 12/6 Switch/Shutter Multi-Actuator, Manual 16A. MDRC GAP 12-1001 12/6 Channel Switch/Shutter Multi-Actuator, 10A. MDRC GAP 19-1001 19/8 Channel Switch/Shutter Multi-Actuator 10A. MDRC