[Product Content] You Will Receive 2 Retractable Id Card Sets.The Size Of Each Card Holder Is 7*11.1Cm, The Size Of The Inner Core Is 5.4*8.5Cm, And The Color Is Black, Which Is Suitable For Loading Documents And Portable Carrying. [Product Material] This Product Is Made Of Plastic, And Its Waterproof And Transparent Design Protects Your Id From Being Defaced, And It Is Also Easy To View.The Plastic Material Is Lightweight And Durable, Not Easy To Break, And Suitable For Long-Term Use. [Anti-Lost Design] This Product Is Designed With An Anti-Lost Lanyard With A Rope Length Of 75Cm.When Using, The Card Holder Can Be Hung On The Chest Or In Other Positions, Which Is Convenient For Easy Access And Use, While Reducing The Risk Of Lost Documents. It Is Very Suitable For Various Occasions Such As Campus, Office And Exhibition. [Easy To Use] This Product Is Easy To Use, Just Put The Id In The Card Holder, And It Can Be Hung And Used By Lanyard.The Retractable Design Makes It Easy To Pull Out And Withdraw The Certificate, And The Card Holder Automatically Returns To Its Position After Use, Which Is Not Easy To Lose. [Widely Used] This Product Is Very Suitable For Use In Schools, Offices, Exhibition Halls And Other Occasions.Whether It Is Students, Teachers Or Staff, They Can Easily Carry And Present Their Documents Through This Portable Id Card Holder.