The 71305 Flexible Light Shield with Quick Connects is an 11 inch (279 mm) long piece of bellows tubing with a 1.5 Inch Series female-flange on one end and a 1.5 Inch Series male-flange on the other. It folds and extends from 3 to 11 inches (76 to 279 mm). You can easily remove a flange, cut the tube to a shorter length and re-assemble the flange. We use these tubes to enclose the beam from a light source to a monochromator; these are not intended to absorb high power radiation. This item may be used with light sources rated up to 250W.