The Pop-up Micro Dumbell 4x6mm is an extremely versatile bait addressed to feeder fishing with small hooks and delicate baits. The micro dumbell has two essential characteristics: very high calibrated (it can balance any mount regardless of the size of the needle) and solubility depending on the water temperature (lasts 2-3 hours in cold water in spring and autumn, and up to 1 hour in the period of summer).