Notes during the machine operation: Some lens has a protective point, this point is a measure for anti-static burn and keep its safety , as our clothes and hair are all static materials, you can open this protective point with an high-grade anti-static iron if you use a common iron, it requires much special attention, first, if the iron has melted the tin-can temperature, do remember to unplug the iron supply, then go to open the lens protection point, this is to prevent lens from burning by static electricity iron. Optical Pick-Up Lens -210A for DVD CD colour:black Material:plastic size: 4.5*3.5cm Package Contents: 10 * -210A Optical Pick-Up Lens Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.