Silica Gel sachet's come in sizes ranging from 50gm to 1000gm.
The sachet material is Tyvek - manufactured by Dupont and approved by the FDA (USA) for use in the Pharmaceutical and food industry. Tyvek material is also used in applications where fine dust or particulate excaping from within the sachet is not acceptable.
The Silica gel in there sachets comply with Mil Spec. MIL-D-3463-E Type 1 &11 See safety data sheet link below.These Ultra-Clean sachets are particularly suited to Dehumidification of Electronic & Laser equipent, Moisture sensitive Instrumentation, and other apparatus or equipment subject to deterioration due to excess moisture. Bags over 100 grams are made to order ( max. size 2000 grams).