Sierra 82301P Heavy Duty Nylon 3.5K Tachometer Features: Dial Range: 0-3500 RPM Size: 3″ Tachometers (Electric): Diesel Signaflex Sender Code: Signaflex Classic white graphics and pointer on deep black face Low-profile polished stainless steel bezels Perimeter lighting and scratch resistant glass lens Ideal replacement for Stewart-Warner ”Deluxe” instruments Optional add-on eyebrow or square bezels available (see Gauge Accessories for details) Note: Signaflex senders and drive tips are for domestic diesel engines only Voltage: 12 VDC Current Draw: 0.10 – 0.15 A Operating Temperature: -40C to +70C Ingress Protection: IP 65 Bezel O.D.: 3.61 Housing O.D.: 3.39 Hole Size: 3.43