When inserting in a circular mouth container (such as a bottle), if there is something like a groove through which air escapes, it may be poured smoothly. Is it impossible at this price? leg? The part of it may be a little short.
I bought a funnel with a 45 mm aperture. Although it is very satisfactory in price, I think that it is a problem that the caliber is not the inner diameter but the outer diameter. Glass may be a bit thick, and if circular filter paper of 9 cm is used, it will protrude about 4 mm. Normally, the diameter of the funnel is specified by the inner diameter, so it is natural that if you consider it on the premise that circular filter paper is used (All the things of other traders purchased by us were inner diameter.JIS analysis glass Equipment JIS R3503 is that as well). Packing is polite and conscientious, but with this it will hesitate for future purchases.