1. colour optional and variable 2.high quality 3.free sample 4.fast delivery time 5.flexible payment xProduct list : 1) FNG Silica Gel: Spherical Sharp, used for air drying in the air separating process for various industrial gases.2) C Type Silica Gel: Translucent Spherical Sharp, used for drier, adsorbent & catalyst carrier.3) B Type Silica Gel: Transparent Spherical Sharp, mainly used as ...