Inner/Outer: 12/192
Strong ABS plastic construction. 50mm main lens 3x magnification, second lens 6x..
Inner/Outer: 12/144
Strong ABS plastic construction. 65mm main lens 3x magnification, second lens 6x..
Inner/Outer: 12/96
Strong ABS plastic construction. 75mm main lens 3x magnification, second lens 6x..