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New chromaflex adapter, delivery #20, luer tip, kontes ?

Likely N.O.S., this piece is either unused or in like-new condition. A Chromaflex delivery adapter with fritted disc ledge.
Includes a spring-loaded #2 PTFE stopcock plug and a red plastic luer tip protector.
The o-ring is included and appears to be a size 120, having an I.D. of ~25mm and a wall-thickness of 2.62mm.
The O.D. at the top of the piece is about 37mm. The overall height of the entire adapter is about 72mm. The fritted disc ledge has a diameter of 22mm. The exit hole right beneath the ledge has a diameter of ~3mm.
The luer tip is ~7.5mm long. At the top the O.D. is 4.4mm; at the bottom, O.D. is ~4mm. The I.D. is 1mm.
Mfr.#: Probably Kontes #422391-0020
New chromaflex adapter, delivery #20, luer tip, kontes ?