Tube Holder Collar Clip, for 5/8" OD, 1/2" ID Tubing Back Catalog number: 800136 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9968-50 Sorbent Tube, Silica Gel, 8X110, 520/360, 50/BX Price on request 811-9963-50 Sorbent Tube, Microlite, 6X70, 200mg, 50/BX Price on request 800135-10 Tube Holder Collar Clip, for 1/2" OD, 3/8" ID Tubing (Packg of 10) Price on request