The TriView Sleeve is nearly identical to the standard TriView marker post but without the TriGrip Anchor or Flex PLUS rod. It is commonly placed over U-channel posts or round pipes to improve visibility and reduce installation cost. Features include 360-degree visibility, UV-stable RhinoPoly® construction, pre-punched 3/8” hole for installation, and a 10-year warranty. (Source: Trident Solutions TriView Sleeve product page and fact sheet.)