Features: Professional technical, precise lens power. 8 standard for your option: 50/100/150/200/250/300/350/400. Thick and solid lenses and for rim, each degree shown close to the lens. Excellent quality and favorable price. The handle has two grooves, antislip design and easy to hold. Bigger size than ordinary flippers enables easier use and more clear measure. Specifications: Material: plastic Type: 50/100/150/200/250/300/350/400(optional) Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Optical Flipper-