Brand: AutomationDirect Item: Encoder coupling For Use With: JTEKT TRD-GK and TRDA-20/25 series encoders Length: 30.2mm Body Material: Aluminum alloy Bore: 10mm to 3/8in Attachment Style: Setscrew AutomationDirect encoder coupling, 10mm to 3/8in bore, aluminum alloy body, setscrew. For use with JTEKT TRD-GK and TRDA-20/25 series encoders.