Replace broken or damaged laser diode housing with this precision-machined housingCompatible with TO-18 5.6 mm laser diodeInstallation: Screw inincluded Lens and springSize: 8 x 45 mmpackage:1 x Laser DiodeNote:Light shooting 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.