Basin/Sink ceramic disc deep seat extender kit 26mm (Pair) [EF1007]. Is your basin or sink tap body really deep? If you are looking to replace your basin or sink tap assemblies only with ceramic disc tapware and prefer a different style to our EZYFIX Modern Lever styled tapware which includes these extenders, then we now offer our patented 26mm tap seat raisers for purchase seperately from our taps. The extenders simply sit in between the tap seat and your new ceramic disc tapware cartridges. View the installation instructions here. This kit comprises of two 26mm extenders. All conveniently delivered to your door !