The fibers are 3 m long and feature a 7 mm long working tip. An integrated protective material (quartz insert) in the hub of the fiber absorbs errant laser blasts and protects the optical deck on the laser system from damage. This protective material makes the blast shield a redundant measure. The fiber connectors are color coded to help distinguish between single- and multi-use fibers and also between the various sizes of the multi-use fibers.