They sure are!
The Slatestone Post Covers are specifically for covering 4x4 or 6x6 deck posts, fence posts, porch posts etc. They are 8" x 8" x 41" and have specific caps to go with them. The caps are called Post Cover Caps and are 10.5" x 10.5" x 3.5". The Post Cover Caps come in Sandstone colors: Brown, Buff, Charcoal, Gray, Graphite, Onyx, Red.
The Slatestone Column Wraps can be used in any column application such as a base of a post or large structural columns. They are 16" x 16" x 30" and have specific Sandstone caps to go with them. The caps are called Sandstone 18" Caps and are 18" x 18" x 3.5". The caps come in Sandstone colors: Brown, Buff, Charcoal, Gray, Graphite, Onyx, Red.