Also listed on other platforms. Please comment before purchasing to prevent any issues. Sunny Bishi BIG 150 Recommended for fast-current and deep-sea chumming. Also recommended for skipjack tuna and yellowfin tuna fishing, which move quickly in schools. The amount of chum released from the top hole can be adjusted. Features a just-stop function for faster opening and closing of the door. Adjust the discharge port by turning the adjustment screw on the head and matching it to the 4-stage memory. During descent, the basket closes with the slide of the inner tube and opens when it stops, allowing you to keep the chum securely until the target depth.