The standard captive lift-off hinge assembly is comprised of one standard lift-off hinge - right hand with single short pin, one standard lift-off hinge - left hand with single short pin, and one standard lift-off hinge - mating hub.
For technical details and images, please search for the product using the 80/20 interactive catalogue found here: https://catalogs.8020.net/80-20-Catalog-26/C/.