Charcoal Tube, Coconut Shell, Standard, 50/100mg,

Tube Holder Collar Clip, for 5/8" OD, 1/2" ID Tubi

Tubing, 1/8" ID x 1/16" W, Clear PVC, (10 ft)

Sulphur Dioxide 1-60 ppm Gas Detector Tube, pk/10