Brand: AutomationDirect Item: Encoder coupling For Use With: JTEKT TRD-N/NA and TRDA-20/25 series encoders Length: 26mm Body Material: Aluminum alloy Bore: 8mm to 3/8in Attachment Style: Setscrew AutomationDirect encoder coupling, 8mm to 3/8in bore, aluminum alloy body, setscrew. For use with JTEKT TRD-N/NA and TRDA-20/25 series encoders.