These light shields are compatible with the Oriel 1.5 inch flange system. Each flexible light shield has a male and female flange for simple coupling to an Oriel light source and monochromator or spectrograph. If the expandable 3 to 11 inch (76 to 279 mm) range is not suitable, the flange can easily be removed and attached to allow for the tube to be cut to a shorter length. In cases in which components of two different flange sizes or two same gender flanges must be coupled. Oriel offers a complete line of Flange Couplers and Adapters.