I've lost the instruction manual, so the model number is unclear, but it's probably the BIRD STRAP Clarinet Strap Pro Model BS-CL-PRO. According to the instruction manual, the strap's cord length can be adjusted, but I wasn't confident, so I haven't adjusted it at all and it's still the same as when I bought it. I don't have the receipt, so I don't know the purchase date, but it was probably after 2018 or after the Reiwa era began. It got in the way when I was using a swab, so I used it a few times and then stored it at home. Thank you for looking.