Brand: AutomationDirect Item: Encoder coupling For Use With: JTEKT TRDA-2E series encoders Length: 19.1mm Body Material: Aluminum alloy Bore: 1/4in Attachment Style: Setscrew AutomationDirect encoder coupling, 1/4in bore, aluminum alloy body, setscrew. For use with JTEKT TRDA-2E series encoders.