Valve, Pneumatically Actuated, Stainless Steel, Waste for the ABI 3900 Oligo Synthesizer, Exchange. Since this is an exchange part, you must return your old part complete with all components. If you do not return your part or you return it missing components, you will be charged as though you purchased a new part without exchange. If you do not want to send your old part back to us, you should purchase this same item as non exchange from us.
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