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3970-30, Valve stem,distribution head,0-20mm,PTFE
Borosilicate glass, lower distribution heads for model R220 rotary evaporators. Heads have improved designs by utilizing Ace-Threds for connections. Available either safety coated or in plain versions. All caps included. Inner ball joint has a CAPFE o-ring. End #15 Ace-Thred connects to the 3978 valve assembly.
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