Yuyao Ritek Electronics Co.,Ltd is one of the leading China 7 inch magnifier lamp with covered arm manufacturers and suppliers,Website:http://www.ritekmagnifier.com, welcome to contact us.RT206.05 Lens size: 7" (177mm)Diopter options: 3 or 6Light source: T5 22 Watt circular lampArm with internal springs and plastic coverArm length: 36"Clour options: White, BlackTable clamp included