The materials in this photofabrication kit are compliant with either UL #E214381 for materials used in the fabrication of printed wiring boards, Restriction of Hazardous Substances (RoHS), or California Air Resources Board (CARB). Contains sodium hydroxide; protective gloves, clothing, and eye protection must be worn. Includes Additional items required 3 x 5" PCB 4 x 6" PCB 6 x 6" PCB 1 Bottle (475 ml) Positive Developer 1 Bottle (475 ml) ferric chloride 2 Foam brushes Plastic development tray Rubber gloves Instruction sheet Exposure source and transparent weight Etchant tank, or glass tray, or plastic tray (for etching purposes) Artwork laser printed on a transparency. Eye protection Catalog Number Description 416-K Kit