Externally toothed cable ties with a smooth inside for bundling. Colored cable ties can be used for labeling. Wide contact surface minimizes the risk of damage. Flat head geometry for tight spaces. Parallel looping ensures an optimal fit around the bundled goods. These cable ties were originally developed for use in the energy supply sector to bundle cables easily and safely even in areas with limited space. The colored cable ties with a flat head design are ideal for securing foam padding in play areas or for labeling purposes. The special head design of the PE series avoids sharp edges.