EPMAN 37mm Compact Micro Digital Smoked Vacuum Gauge Universal 3-4-6-8 Cylinder Engines (Black) CNC produced aluminium body with a perfectly anodised finish along with an integral slim line dash mount foot adaptable and can easily be dash, pillar or roof mounted. One of the most compact gauge displays available, so combined with great performance and stunning looks makes this a very attractive addition to any vehicle. All gauges in this series share the same physical external dimensions (70 mm long with a 37 mm diameter digital display) and weight is approximately 100 grams only Each gauge is supplied as a complete kit with installation instructions.