Up for sale is a genuine vintage Pyrex glass laboratory bottle stopper. This is a solid glass penny head style stopper featuring a standard taper ground glass joint size 19. As clearly visible in image.png and image_5.png, the top handle portion is clearly embossed with the authentic PYREX brand name alongside the official standard taper symbol and the sizing number 19. Condition: The stopper is in excellent vintage condition with no major chips, cracks, or deep scratches that would impact a proper seal. The frosted ground glass joint remains clean and uniform. Please review all of these reference images to inspect the exact cosmetic condition of the piece you will receive.