A ball-raced and spring loaded quick coupler female socket going to a male 1/8" BSP thread with a M14 central hex. The male thread has a concaved internal seat, enabling connection to microbore high pressure PCP hoses and leads.
 
The quick coupler also comes with a white nylon washer enabling connection to normal (flat) PCP hose types.
 
Maximum working pressure: 360bar / 5200psi.