Monster Ball Style Loose-lining Marker Large 2.5cm and 1.5cm diameter each, 1 The 1.5cm and 2.5cm diameters are large, so use them when adding heavier nymphs or shots. The leader is inserted into the slit of the screw part and fixed with a screw. This marker is easy to use because through-hole types and tape-attached types are difficult to remove once attached. Use in combination of large and small sizes for buoyancy adjustment (this can only be used with the same color). Rubber ring included. Easy to attach and detach. Can be used in two-tone colors.