A larger Sakura Koi Water Brush tank does not automatically mean a larger brush tip. The reservoir and the painting end are separate choices in the product range.
The Sakura of America product page lists 4 ml and 9 ml tanks. Its brush options include small #2 round, medium #6 round, medium #6 flat and large #8 round. Preserve both fields when comparing a retailer’s short title.
Make two decisions
First choose the mark: a fine detail, a broader wash or an edge made with a flat brush. Then choose the carrying format and reservoir. A travel kit can need a smaller storage length without needing the finest painting tip.
| Shopping field | What to write down |
|---|---|
| Brush | Size and round or flat shape |
| Reservoir | 4 ml or 9 ml |
| Storage | Assembled or collapsed measurement |
Sakura describes the brush as separating into a tip section and a barrel, with a plug for carrying water. Its collapsed-length figures are therefore not the same thing as the length of a brush ready to paint. A pouch-fit comparison should identify which state is being measured.
For a replacement purchase, photograph the existing tip and barrel label if available. Ask the seller to confirm the full combination rather than accepting “medium Koi” as a complete description. We have not verified that loose parts from different releases can be exchanged.
Documentation read 25 October 2026. No flow-control, leakage, painting or tank-duration test. Choose by the intended marks and carrying arrangement rather than treating water capacity as a performance rating. More buying guides.
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