The SOLA-LLG has been optimized for operation with the SOLA II LED Light Engine Illuminators. Use this Liquid Light Guide (LLG) to deliver light easily and efficiently from the SOLA II Fiber Optic Illuminator to a collimator, microscope, or sample.  The external packaging is a PVC jacket with stainless steel end caps. Both end cap dimensions are the same, as are the connectors, so there's no worry of reversing polarity of the cable.