SKC was the first to bring NIOSH sorbent tube design to the commercial market and leads the way today in sorbent tube research. SKC Sorbent Sample Tubes meet NIOSH and OSHA specifications and feature low backgrounds, accurate sorbent weights, consistent method-specified mesh size and separators, and a backup sorbent layer for breakthrough indication. SKC Sorbent Sample Tubes are tested for uniform back pressure and are validated by OSHA, NIOSH, and EPA methods. Over 100 SKC sorbent sample tubes are available for standard and specialty applications. SKC also manufactures custom sorbent tubes. Look for the SKC name when choosing sorbent sample tubes.