ProLine Series No-Hub Couplings are ideal for above and below-ground DWV applications. These couplings are designed with three primary components that makes this coupling ideal for everyday professionals: the gasket, shielding and worm clamp bands. The internal gasket is made of neoprene, a highly trusted and resistant to DWV deterioration, which is flexible and will fill any gaps around the soil pipe when tightened. The stainless steel shield is designed to not only protect the gasket from external threats but also provide critical stability and anti-shearing force protection for a long-lasting connection. The clamp bands are what provide for a reliable connection, locking the coupling & pipe together into a leak-proof connection.