Features: Material: Metal Color: Silver Lens: With 200-1100nm Plastic lens Inner Diameter: D10.3x40mm Outside Diameter: 12 x 40 mm (excluding the cap) 10x20mm circuit driver can be mounted inside Diode housing for TO-18 laser diode With spring,It can help the diode contact the housing more tightly Package: 2pcs TO-18 5.6mm Laser Diode housing with Lens and spring and cap TO-18 5.6mm Laser Diode housing with Lens and spring and cap ASIN B019MZ60EI Item Weight 1.76 ounces Manufacturer Q-BAIHE Item model number Housing-1240-5*6-2pcs Package Dimensions 0.59 x 0.39 x 0.2 inches