⢠Designed to check engine oil pressure in both cars and trucks. Easy to read dual scale gauge. Complete with 24â (600mm) of oil proof hose with 1/8â NPT. ⢠Also includes 1/4â NPT and 3/8â NPT adapters. ⢠Dual gauge readings: 0 to 300 psi (0 to 21 bar) ⢠Gauge diameter: