New OEM Genuine Nissan original heater hose clamp for Datsun 240Z, 260Z and 280Z 1970-78. These hose clamps fit the heater hoses that go under the dash and out into the engine compartment. This clamp measures .980" (approx 1") when fully open. Dastun Z cars require a maximum of 10-12 of these hose clamps to replace all of them.