• Disposable Filter Sock Replacement Elements, for Use with 4" Flange Assemblies (10 Pack) KWD 6.500
• Reef Diaper Disposable Filter Socks, Replaces Standard 4" Felt Socks, Freshwater and Saltwater Compatible, Starter Kit Includes 2ea Flange Assemblies & 10ea Filter Elements KWD 11.500
• Reef Diaper Disposable Filter Sock Flange Assembly, for Use with 4" Filter Elements KWD 4