Digital Combo series Stepper Motor series Yacht series Accessories Others     WS-W5271B Electric Vacuum Gauge WS-MW5271B Mechanical Vacuum Gauge WS-W5277B Electric Air/Fuel Ratio Gauge WS-W5291B Electric Volt Gauge WS-W5293B Electric Tachometer WA5201B / WA6001B Electric Boost Gauge   1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20