The stainless steel flush sampling head is used in conjunction with the capillary T piece and 10mm nylon tubing, to form a flush sampling kit. It replaces the normal flush polypropylene head, it is used in harsh industrial environments, or in prisons where the prisoners occasionally block the 2mm central hole to set fire to their cells. This head features a discrete sampling hole that is not visible from the exterior of 3mm. This continues to sample the air if the central
hole is obstructed.