Delkin Devices 25PK DVD 4.7 GB ARCHIVAL GOLD (DDVD-R/25 SPINDLE) Speed - Up to 8x Capacity - Up to 4.7 GB / 2 Hours Lifetime of 100 years 24-Karat Gold is used as the reflective layer of the disc - resists the effects of temperature and humidity and Prevents oxidation, a common cause of failure to most DVD-R's