February 28, 2007 Norris Cylinder Company is issuing a mandatory recall on certain A75-A420 size acetylene cylinders that were manufactured in January and early February 2007. This does not affect "B" and "MC" style acetylene cylinders. If you have knowledge of a third party to which you have provided acetylene cylinders covered by this notice, please notify your Norris sales representative or me as soon as possible. Based on recent testing conducted by Norris Cylinder Company, we believe that the possibility exists that the porous mass in some of these cylinders may settle beyond the acceptable limits as defined by the US Department of Transportation and Transport Canada. No accident or incidents have been reported with the use of these cylinders but as a precautionary measure, we are recalling the cylinders to insure that the mass is within acceptable clearance levels. The cylinders in question are to be removed from service immediately. Click here to view a drawing of the cylinder spud and the stampings that indicates when the mass was produced. Any use of cylinders with the spud marking shown must be immediately discontinued and the subject cylinders quarantined and returned to Norris for re-inspection. This recall notice only affects cylinder that contain the listed spud markings. Click here to see how to identify the markings. If you have any cylinders that are listed in this recall notice, please contact Fred Grindle at 1-800-527-8418 ext 644 and receive a return goods authorization number (RGA). Norris will cover return shipping costs and the replacement or repair of the cylinders at issue. Following evaluation of the returned cylinders by Norris, we will return or replace, as necessary, such cylinders in as timely a manner as practicable. The cylinders passing the inspection will be identified to prevent confusion on what has and has not been inspected and approved for continued service. Thank you for your immediate attention with this matter. We apologize for any inconvenience this recall may cause and assure you that the safety and quality of our product are essential to the proud Norris history. If you have any questions, please contact your Norris sales representative or me immediately. Best regards, Brian McGuire President