Single Variable Flow Kit, 6 x 70mm (Standard Charc Back Catalog number: 800253 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9963-50 Sorbent Tube, Microlite, 6X70, 200mg, 50/BX Price on request 800075 Tube Holder Quad Variable Flow, only Price on request 800254 Single Variable Flow Kit, 5 x 150mm [Kitagawa TWA Price on request