It is good that the outside diameter is 21.8 mm, but it was decided to return the shaft diameter as small as 8 mm. Also, again, after confirming the inside diameter, I bought B-16 because the inside diameter of lobex was 11 mm, but the thing that was sent was also to return the inside diameter small. Although photographs are reliable at the time of purchase, the dimensions of drilling of the outer diameter are displayed, but there is nothing to mention about the inner diameter. The shipping cost when returning for the lack of explanation of goods here is a burden, how high the goods or how it is treated even if many people buy a lot, TSE 1 part It seems to be a weak bull teasing with companies' treats There was a major dissatisfaction. Still, I think that I will continue shopping in the future, so it is even more frustrating. I would like to have a description of detailed dimensions than photographs.