Tube Holder Adapter, 3/16" to 1/4" Ends Back Catalog number: 200187 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 800072 Tube Holder Single Variable Flow, only Price on request 800254 Single Variable Flow Kit, 5 x 150mm [Kitagawa TWA Price on request