3 sizes to choose from:
a. 1.7 cm (0.67inch) outer diameter, 25 cm (9.8inch) main body length excluding stem and joint, 24/40 joint size. Plastic stopper valve. A thinner size suitable for loading smaller quantity material, but also with the same large joint on top for connecting a common solvent bulb. This column will fit up to 15 g of silica. Therefore, based on a sample to silica loading ratio of 1:30 - 1:100, a max of 0.15-0.5 g sample can be loaded.
 
b. 3 cm (1.18inch) outer diameter, 30 cm (11.8inch) main body length excluding stem and joint, 24/40 joint size. Plastic stopper valve. Large and sturdy to fit your synthesis project needs. This column will fit 50+ g of silica. Therefore, based on a sample to silica loading ratio of 1:30 - 1:100, a max of 0.5-1.7 g sample can be loaded.
 
c. 3 cm (1.18inch) outer diameter, 30 cm (11.8inch) main body length excluding stem and joint, 24/40 joint size, with frit. Plastic stopper valve. Large and sturdy to fit your synthesis project needs.This column will fit 50+g of silica. Therefore, based on a sample to silica loading ratio of 1:30 - 1:100, a max of 0.5-1.7 g sample can be loaded.