Introduction to Lab Products SternTek® laboratory products are high quality, economical materials and machines used for a variety of functions. Our LC Custom Tray and Base Plate Material are supplied in prefabricated sheets and are non-brittle and easy to grind. The tray material may be cured in the SternTek® Light Box, which emits high intensity blue and UV light. The SternTek® Duplicating Material, an extremely precise pourable duplicating addition silicone, can be accurately and easily mixed in our automatic Duplicating Dispensing Unit.