Matze Koch Boilies MK Adventure Booster Balls (Halibut/Shrimp) Matzes Boilierange has the ability to release the valuable ingredients of the protein balls even faster into the water. This makes the balls all the more effective in releasing their attractant effect, attracting fish to the feeding place from a large radius. Despite an incredibly attractive consistency, which has been proven to catch more fish, they keep fish on the hook all night long. If you have extreme whitefish or crab problems, you can also let the Booster Balls harden without any problems. Simply leave them open for a few days until the desired degree of hardness is reached. Content: 1 kg.