Ordering Procedure Online ordering is currently not available. We urge you to call to discuss filter selections with a NoIR technical representative. To order products, simply select filter color and style designation. (for example, 81 filter in style #31 or 81 filter in style U.) Order through NoIR Medical Technologies at 800-521-9746 or 734-769-5565 or by fax at 734-769-1708.