The ESSENTRA/RICHCO part VMCG-90-MPBK-K is a vertical card guide that is designed for M3 size cards. It features a stylish gray color that seamlessly blends with most electronic equipment. The card guide has a height of 90.0 mm (3.543 in), providing ample space to securely hold the card in place. It is a reliable and durable solution for organizing and protecting your electronic cards.