RediSep® Rf Alumina Neutral Columns, 160 gram.  Package of 12.

Single use alumina columns run under normal phase conditions and offer different selectivity to silica.  Neutral alumina columns are useful when samples are acid sensitive and prone to degradation on normal phase silica gel. 

Specifications:
Reusability:  Single use
Particle Size:  40-63 µm irregular
Mesh Size:  230-400
Pore Size:  60 Å
Surface Area:  m²/g:  200 ±50
pH:  Acidic 4.5 ±0.4
        Neutral  7.0
        Basic  9.7 ±0.3
Loading Capacity:  0.5-4%