Hydraulic-Coupler-Faithfull-MC-04-4-B-p-Standard-hydraulic-coupler-to-suit-most-greasing-application-fitted-with-a-spring-loaded-ball-check-mechanism-to-prevent-pressure-loss-&-four-fully-hardened-spring-steel-jaws-for-a-long-service-life-br-This-product-is-for-use-with-h&-operated-grease-guns-only-with-a-working-pressure-of-up-to-6-000psi-413-bar-br-Fits-Faithfull-grease-guns-FAI-GGHD-&-FAI-GGMP-&-flexible-hoses-FAI-GGHOSE12-&-FAI-GGHOSE18-br-Suitable-for-use-h&-ope