Railings AZEK Railings Products > Railings > AZEK Railings Timbertech Black Island Cap 5.5″ Timbertech Black Island Cap quantity Add to Quote SKU: ARBPOST55IC Category: AZEK Railings Related products Timbertech Black Pyramid Cap Add to Quote Azek 8’X 36″ White Premier Rail Kit. Add to Quote Azek 6’X 36″ White Premier Rail Kit. Add to Quote Timbertech Universal Rail Pack 10′; Black Add to Quote