Smoke Stick refill - pack of 6

Colour the Air with Smoke—Then it's Visible A visible air stream is nothing more than coloured air. Smoke reveals air movements and exposes leakage in air ducts and plumbing. Smoke is an unbeatable tool for performance tests for ventilation in apartment buildings and offices. It is mostly our line of white smoke products that are used for this purpose. White smoke is highly reflective in daylight