【moA】O-ring 10pcs 's Japan Review

After cleaning a barrel I bought on a flea market site with citric acid, the shaft started to loosen quickly no matter how tightly I tightened it, which was very inconvenient, so I purchased this product. I was not expecting much from this product as it was the first time for me to use O-rings, but after installing it, the shaft does not loosen at all compared to before! I wish I had bought it earlier. I am very satisfied with the low price.