Designed for metal recovery using Ion-Exchange resins such as Amborane. Borosilicate glass column has #25 Ace-Thred at both ends. Polypropylene end fittings form a leak-tight seal with FETFE O-Rings. Fittings have 1/4" npt female thread for connecting 3/8" O.D. flexible vinyl tubing from pump and reservoir using a 1/4" to 3/8" tubing connector. Normal flow is in upward direction. Complete unit consists column, pump, tubing, screen supports, O-ring(s), ring stand, clamp, screen supports, connector and elbow tubes.