StarTech.com 10 Pack SFP Dust Cover for Open SFP/SFP+ Slots - Fiber Optic Dust Caps/Plugs - Pull Tab Network Switch Port Protector/Cover - Supports Network Switch, Fiber Optic Equipment, Router, Media Converter, Network Card - Durable, Dust Resistant, Dirt Resistant, Break Resistant - Thermoplastic Elastomer (TPE), Santoprene - Black - 10 / Pack