Yuyao Ritek Electronics Co.,Ltd is one of the leading China 5 inch magnifier lamp manufacturers and suppliers,Website:http://www.ritekmagnifier.com, welcome to contact us.RT201.01 Lens size: 5" (127mm) Diopter options: 3, 6 or 12 Light source: T9 22 Watt circular lamp Arm with internal springs Arm length: 36" Clour options: White, Black Table clamp included