We do not know who manufactured these parts, but they are good quality
borosilicate lab glass. Overall length of approx 1.25". Made from ~8mm or
5/16" OD, and approx 4.8mm or 3/16" ID glass tubing. Double crimped internally
Related Borosilicate Glass Tube 1.25" x 5/16" 8mm Tip Whip Mouthpiece Mouth Piece Stem
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