This category contains post caps from various manufacturers, designed to fit composite post sleeves. Most caps are proprietary to the post sleeve manufacturer. There are very few cases where one brand post cap will fit another brand post sleeve. When we discover a match we list the known style match in the item. An example would be Timbertech Radiance post sleeves use Timbertech Post caps, however, many of the 5" Designer Post Caps fit well on the same sleeve. Another example would be the Azek Reserve post sleeve, a 6" Designer Post Cap will fit well on that sleeve. Measure the outside dimensions of your post sleeve & select that size in the SEARCH BY POST SIZE list to the left.