G-Biosciences offers 5 and 20 ml Gravity Flow Columns designed for small scale gravity flow purifications.

G-Bioscience's 5 ml columns have an internal volume of 6.5 ml, a resin bed volume of 2.5 ml and a reservoir volume of 4 ml.

G-Bioscience's 20 ml columns are graduated and have an internal volume of 32 ml, a resin bed volume of 20 ml and a reservoir volume of 12 ml.