Through affiliation with a non-profit organization, the Association of Retarded Citizens (ARC) of Butler County, Pennsylvania, MSA has established a cylinder recycling center, where calibration cylinders are salvaged for scrap, rather than refilled. All money generated from selling the scrap cylinders is placed in the ARC operating fund for salaries and operating costs. Calibration cylinders are considered hazardous material unless the cylinders are empty. MSA has developed special de-valving tools that will ensure that the cylinder is empty and render the cylinder non-fillable. For your convenience, MSA also offers a specially pre-addressed shipping box (also recyclable) which helps you pay the lowest shipping costs available. The MSA Recycling Center limits the return of calibration cylinders to MSA-logoed cylinders only. Non-MSA cylinders will be rejected. For additional details, call our Customer Service Center at 1-800-MSA-2222.