The Manfrotto 110 Braked Caster Set is a set of 3 75mm diameter braked wheels with adapter for any light stand legs that are 22mm in diameter. They slip onto the leg ends, and are locked in place using a hex wrench.
They are specifically compatible with the following Manfroto stands: 007U, 008U, 008XU, 008BU, 126U, 145U, 608BU, 626BU, 645BU.