Fittings DK-Lok brings you excellent quality Outstanding customer service. and availability Enjoy Dk-Lok tube fitting working your application ! Push-On Hose Fittings Catalog 2D / 3D Spec. Hose Size : 1/4″, 3/8″, 1/2″, 5/8″, 3/4″, and 1″ O.D DK-Lok Tube Fittings (1/4″, 3/8″, 1/2″) Tube Adapters (1/4″ to 3/4″) Unions (1/4″ to 3/4″) Male Connectors (1/4″ to 3/4″)Brief Description Designed for use with high-quality and low pressure elastomeric compound hose such as textile braid reinforced synthetic rubber hose No special tools or clamps are required for installation Assemblies can be done in seconds. DK-Lok Push-On fittings are reusable. Just replace the hose with no special tools. Faster and easier maintenance.