SY525-silica gel (dehumidifier) 20 g / 100 g

One silica gel (about 2g~)

Specifications: Width * Length (4.8cm * 4.8cm)

What is silica gel?

Silica gel is an adsorbent made by solidifying colloidal solution of silicic acid.
It is often called desiccant.
Developed by Dr.Walten A. Patrick of John Hopkins University as an adsorbent known for GAS MASK containers during World War I