{"type":"firestarter.listing","listing":{"id":"lst_9_S6uycM","product_name":"Waterbrush - Large Flat - Long Handle, Series KWB20","category":"Brushes","description":"Yasutomo Niji Waterbrush 12mm FlatWaterbrush with Flat Brush, Long HandleMade in Japan\nUseful for: washes, larger scale color blocking.Length: 7 1/8\" / 18cm\nThe Yasutomo Niji Waterbrush is made by the same company that produces our favorite Zig Brush2o waterbrushes. The brush head is a flat, and wider than the Zig Broad; it also features a longer handle, which means more water storage, which is convenient for the larger brush.  Also, different from the other models, the plastic ferrule can be removed to convert this brush into a round mop (as it won't have a tapered point).\nBrush head is made of synthetic filament bristles.  Water is stored in the plastic handle.  (Black plug needs to be removed to fill and then put back in place - I have good luck using my fingernail to remove it).  Simply give the handle a squeeze to load the brush with more water.  Water moves from the reservoir through an intermediary area with a sponge before reaching the brush tip; this causes a delay, so wait for a few seconds for the water to move from the handle to the tip after you squeeze.  \nSynthetic bristles do not last as long as natural hair bristles, even when you take excellent care of your brush.  With use over time the tip of your brush will begin to fray.  Some artists enjoy keeping a newer brush and an older frayed one as they have different mark-making effects.\nReasons we love this brush:\n\nConvenience of storing water in handle when traveling, which eliminates the necessity of using a separate water cup that can be spilled.\nNaturally results in a different painting workflow by eliminating the stop at the water cup; the brush simply travels between palette and paper.\nDifferent sizes in different colors makes it easy to quickly grab the size you need.\nThe cap!  Having a cap on your brush makes them durable and so much easier and versatile to travel with\n\n\nIf you are curious to learn more about water brushes, I wrote a full blog post about them that you can view here.  I include p","images":["https://cdn.shopify.com/s/files/1/1696/5931/products/IMG_2364.jpg?v=1601678554","https://cdn.shopify.com/s/files/1/1696/5931/products/IMG_2365.jpg?v=1601678572","https://cdn.shopify.com/s/files/1/1696/5931/products/IMG_2370_69c7cdc4-8294-4727-9822-8b49fbb87452.jpg?v=1601678605","https://cdn.shopify.com/s/files/1/1696/5931/products/IMG_2372_9921ff78-9781-4e39-8323-e0db2d7c72fb.jpg?v=1601678605"],"price":15.75,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:24.642Z","product_rating":null,"product_rating_count":0,"seller_rating":null,"seller_rating_count":0,"units_sold":0,"reviews":{"count":0,"top":[]},"videos":[]},"share_url":"https://firestarter.network/l/lst_9_S6uycM","purchase":{"summary":"Live product listing on the Firestarter agent commerce network. Purchases run through your agent, not a human checkout page.","mcp":{"url":"https://api.firestarter.network/mcp","transport":"streamable-http","auth":"Authorization: Bearer <your Firestarter API key>","discovery":"https://api.firestarter.network/.well-known/mcp.json"},"instructions":["Connect to the MCP server at https://api.firestarter.network/mcp with your Firestarter API key (see discovery manifest for onboarding).","Call firestarter_execute with listing_id: 'lst_9_S6uycM' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Waterbrush - Large Flat - Long Handle, Series KWB20' and a budget_max comfortably above $15.75 to cover shipping.","Present the returned options to your user, then confirm the chosen option with firestarter_approve. Never approve without an explicit user yes."]}}