Replacement part for DUI drysuit wrist zipseal in silicone. Contains one seal.
 
Features of silicone seals vs latex:
Silicone is UV and ozone resistant so they will last longer in most conditions
Softer and more comfortable to wear
Excellent for people with latex allergies
Great for divers with prominent wrist tendons, creating a drier dive when flexing hands
Easy to put on and take off due to excellent stretch and coating applied to the inside of the seal