This Fantasea O-Ring Set Type C is for the new generation of Fantasea housings. The set includes 2 o-ring seals and a tube of silicone grease. The o-ring resembles a thick rubber band. It is designed to establish a watertight seal when going underwater.
Manufactured to precision tolerances required to hold a pressure seal on your housing and made of elastomeric material, it provides the means by which a watertight seal is formed.