This vacuum gauge set features 4 precision gauges. Gauge reading: 0-38hg Gauges are mounted to a heavy metal base intended for bench top use. It can be modified for 4 or 6 cylinder use. Parts included in the Kit: 1 qty x Bracket 4 qty x 2 & 3/4″ Gauges 4 qty x Hoses 4mm(.I.D)x7mm(O.D.)x75cm (L) 4 qty x plastic Valves 5.5mm(O.D.) 2 qty x 180mm(M5xP0.8) Brass Extension 2 qty x 65mm(M5xP0.8) Brass Extension 1 Carburetor Adjusting Tool The gauge is universal tool, contains 5mm adapters.