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 200131 Impinger Holder, Double, Aluminum, GilAir/HFS Price on request 200113-10 Tube Holder Housing, 7-10 x 110mm, 5/8", L240 (Pac Price on request 811-9981-50 Sorbent Tube, Porapak-N, 6X70, 88/44, 50/BX Price on request