Description For Eyepieces 1.2-2.3" Wide For Phones 2.6-3.7" Wide ABS Plastic Construction Mounting 2x Spring-Loaded Clamp1x Lens Clamp Thumbscrew Color Black Material of Construction ABS Plastic Dimensions 5.9 x 3.3 x 1.7" / 149.9 x 83.8 x 43.2 mm