A 52mm mechanical fuel pressure gauge designed for low pressure fuel systems. The black dial face has a scale of 0-15 Psi and features a white back light.The back of the gauge has a 1/8" BSP 'nipple' flat seat fitting to allow the fitment of a pressure tube which is sold separately. There is also the option of having a 1/8" BSP cone fitting which has a concave seat to allow an AN (JIC) adaptor to be fitted enabling the gauge to be plumbed in Aeroquip hose. Adaptors are sold separately (Goodridge part number GDR321-03P).