Tube Holder Kit, Dual Variable Manifold (Includes

Sorbent Tube, Microlite, 6X70, 200mg, 50/BX

Sorbent Tube, XAD-7, 6X110, 100/50, 50/BX

Tube Holder Collar Clip, for 3/8" OD, 1/4" ID Tubi