RediSep® Silver C18 Reversed Phase columns, 4.3 gram.  Package of 2. 

Packed with derivatized silica (40-63 µm particle size), providing reproducible, high-capacity purification without the cost and complexity of prep-HPLC.  Reusable when proper storage conditions are maintained.

Specifications:
Reusability:  20 runs (average)
Particle Size:  40-63 µm irregular
Mesh Size:  230-400
Pore Size:  60 Å
Surface Area:  m²/g: 500 ±50
Carbon Content:  >17%
Endcapped:  Yes
Loading Capacity:  0.1-2%