Brand: AutomationDirect Item: Encoder coupling For Use With: JTEKT TRD-N/NA and TRDA-2E series encoders Length: 26mm Body Material: Aluminum alloy Bore: 8mm to 1/4in Attachment Style: Setscrew AutomationDirect encoder coupling, 8mm to 1/4in bore, aluminum alloy body, setscrew. For use with JTEKT TRD-N/NA and TRDA-2E series encoders.