A:
1-Hour UL Fire Endurance Test Subjected to temperatures up to 1700ºF (927ºC) for a duration of one hour, the interior of the unit will remain below 350ºF (177ºC) to protect documents. • UL Explosion Hazard Test Subjected to flash fire in a 2000ºF (1093ºC) furnace for 20 minutes, the unit will not explode or rupture. For pricing and availability please contact Customer Service. They will be glad to help with your question. You may contact them at
http://www.staples.com/sbd/content/help/contact/index.html or by phone at 800-333-3330. Thank you for your inquiry.
Answered on 11/28/2011 by Christina.M from Staples