QSFP+ Dust Covers QSFP28 Caps Suitable for Open QSFP+ QSFP28 Slot on Network Switch/Router/NIC Soft Silicone Type S 50pcs/Pack ^^ Soft silicone, easy to plug and unplug ^^ Protecting QSFP ports from dust, dirt, and other contaminants. Keeping QSFP ports clean by using the dust cover when an QSFP module is not in use. ^^ Preventing potential damage or disruptions caused by dust and debris. Network administrators can help prolong the lifespan and optimize the performance of their networking equipment.