Convenient, easy-to-handle desiccant in a cartridge fits standard glass or plastic desiccators. The cartridge consists of a durable polyester-felt bag with a perforated MylarŪ cover sealed in place. It is filled with NatrasorbŪ TI indicating silica gel beads which change color from blue to pink when moist. Saturated gel can be regenerated in a 300°F (150°C) vented oven, until blue color returns. May be reactivated repeatedly without degradation. Individually sealed in a moisture-proof pouch.