With this Filling System For Cones King Size you can make 25 pre-rolled joints in no time. Filling your cones one by one is a thing of the past with the Knock Box Filling System For Cones. The device is suitable for pure cones 109mm X 20mm Filter . When you have filled the 25 pure cones it is important that you can keep them well. By storing your pre-rolled cones in a joint tube, they stay fresh longer and are protected against moisture.