The magnifying arm can be clipped on the following lamp models: E31707 (Vogue on foot lamp), E35117 (Slimline LED lamp - Large model), E35107 (Slimline LED lamp - Small model) and E31375 (Studio lamp with tripod). This arm is fitted with a lens circled with a magnification of 1.75x (3.0 dioptrie) on a long flexible arm of 55 cm, supplies with a clip to add it to the lamp rod. Help in your careful work 13 cm in diameter 1.75x (3.0 dioptrie) on a 55cm flexible arm.