Slim LED Light Box 1.Super Slim led light box. 2.30mm width.18mm thickness only. 3.Four sides clip frame. 4.SMD LED Light. Slim LED Light Box 1. Item No.: RT-SL2. Graphic size: A0-A4, or customized size.3. SMD LED Light.4. Four sides aluminium clip frames.5. The slim led light box is widely use in business center,super market,bar,bank inn, exhibition.