Protect your network switches from dust & contaminants, by covering up the unused SFP slots. This 10-pack of SFP dust covers provides an inexpensive way to protect your network switches & fiber optic equipment from dust & contaminants, by covering the exposed & unused SFP slots. Simply insert the dust covers into any empty SFP/SFP+ slots in your network switches. made from Santoprene thermoplastic rubber (TPE), the durable dust covers keep out dirt & dust, protecting your networking equipment against contaminants that could cause connection issues. A handy tab makes it easy to insert & remove the SFP dust covers.