This is the DUI Replacement Drysuit ZipSeal Silicone Wrist Seal PAIR for Dry Suit Diving Features: All of the convenience of DUI&';s patented ZipSeals with the comfort and durability of silicone Can be installed on any DUI drysuit Can be cut to size SILICONE RUBBER has a great many variations and can be compounded to meet any number of applications. Silicone can be compounded to have tensile in the area of 1500 psi and tear up to 200 lbs ; low compression set and good resilience, moderate solvent resistance; excellent heat resistance; good release characteristics; extreme low temperature properties; and can be highly resistant to oxidation and ozone attack. ZipSeals allow for quick replacement of seals on-site. Never miss a dive again!