Comparison : Item # W138-4, 1/4" Hose Inner Diameter Compliant Hose to Hose Mender Connector
Item # W138-5, 5/16" Hose Inner Diameter Compliant Hose to Hose Mender Connector
Item # W138-6, 3/8" Hose Inner Diameter Compliant Hose to Hose Mender Connector
Item # W138-8, 1/2" Hose Inner Diameter Compliant Hose to Hose Mender Connector
Item # W138-10, 5/8" Hose Inner Diameter Compliant Hose to Hose Mender Connector