Features:. PC817 EL817C LTV817 PC817-1 DIP-4 OPTOCOUPLER SHARP.. Made from Eco-friendly material, non-toxic and safe. . Fine workmanship, delicate appearance, long lasting.Specifications:Material:metalColor:blackItem Size: 60*80MMPackage Included:50 x Optical IsolatorsNotes:1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. we guarantee the style is the same as shown in the pictures.2. Due to the manual measurement and different measurement methods, please allow 1-5mm deviation. Thanks!