Funnel F29, solvent addition

Design of funnel permits addition of solvents to flash chromatography columns without disturbing the silica-gel/packing layer. Lower end of the funnel is closed and the stem has a series of small holes through which the solvent drains. Top of the funnel is 90mm in diameter with the stem size as listed. * Fit column with 24/29 joint or 35/20 joint. ** Fit column with large joint like 45/40 standard or 50/30 spherical joint.