This outer receiver unit works with the CJ-S700 Cassette Joint Unit for Shimano Alfine SG-S700 internally geared hub. This part can become worn, cracked, or torn, exposing the shift cable and possibly other components to unwanted dirt, water, mud, you name it. You don't want that.

Shimano Nexus and Alfine Internally Geared Hub Cassette Joints - Shimano model # CJ-S7000 - Does not include cable fixing bolt unit - OEM cassette joint unit for Alfine SG-S7000-8