Manufacturer: Bumpodo (Bunpodo) Oil Painting Brushes - Unused, Stored - Set of 5 Made in Japan I am not familiar with oil painting, so I may not be able to answer specialized questions. There are two size 6 brushes, two size 10 brushes, and one size 12 brush. At the time of purchase, the cheapest brush was 650 yen, and the most expensive was 1100 yen, but it seems that prices have increased since then. The reason for the "as-is" condition: Due to long-term storage, there is some staining on the handles, likely from other oil painting materials. Some brushes feel slightly sticky to the touch. It's not enough to get your hands dirty. Considering the brush in half, the stain is on the side with the bristles. I wiped them a little before listing, but the stain didn't come off easily. If you are an oil painter, you might have a cleaner for this type of stain that could remove it. I can't say for sure, so please understand. I am selling these at a very low price because I don't know if the stains can be removed. I believe these are high-quality brushes, and I hope someone will use them. Individual sales are not possible. Bumpodo Oil Painting Brushes, Painting, Illustration Made in Japan Stored Item, As-Is, Defective