Cap Assembly, Double , 38mm, Wash, 3 Foot, Two Polypro Bottle Caps With Stainless Steel Band, TFE Center, EP Gasket, Dr. Oligo with 3/16 inch OD tube for liquid feed to the instrument. These caps use 1/4 inch OD tubes to transfer between the bottles and they use 1/8 inch OD tube to supply gas pressure to bottle number 1.
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