Pre-Formed Rubber Coolant / Bypass Hose - Used

Pre-formed rubber coolant / bypass hose, used take-off from a marine engine. Serpentine shape with two barbed ends (~3/4 in. ID) and one worm-gear clamp attached. Rubber is supple with no visible cracks or splits. No OEM part number is stamped on the hose; the only visible markings ('28 A/4', '19-28') appear to be a clamp size code. Application: unconfirmed marine engine coolant / heater / bypass circuit. Condition: used. Buyer must confirm fitment by part number, photos, dimensions, engine model, serial number, and application before purchase. Used marine part sold as-is unless otherwise stated. No returns on electrical, used, special-order, or installed parts.