Material: zinc alloy + ABS plastic Size: 4*3.1CM; waterproof ferrule size: 11.2*6.8CM; inner diameter: 8.8*6.3CM; thickness 0.7mm; cable length: about 65CM EASY TO USE: With 27.5 inches of durable and extendable steel wire, you can easily pull out the electronic security card or show your ID without removing it, and you can also open the door without removing the key from your belt, allowing you to life is more convenient. Retractable Cord Reel: Uses a steel tear-resistant drawcord, making it super wear-resistant, sturdy, and stronger than the nylon cord of the Universal ID Badge Holder and retractable. Tested over 100,000 pulls. WATER AND DUST PROOF: Opens and closes easily with the excellent resealable zipper lock closure. These water and dust resistant plastic card holders are perfect for keeping your important paper badges or cards dry, clean and safe.