Oil Pressure Gauge with Ammeter fits for Ford Tractor 2N, 8N, 9N, NAA, 601, 701, 801, 901, 2000, 4000 52 mm chrome bezel Oil Pressure Gauge: Measures oil pressure with a 52mm gauge, equipped with a 1/8" NPT male thread 80 PSI Includes illumination dial, chrome bezel and all necessary mounting hardware Includes back lite bulbs and holders Ampere Gauge: Measures electrical current with a 52mm gauge, 30 - 30 dial, rear mounting studs and bracket with light feature in gauge.