PC or PEI jar. White PP or white PC plate. Vacuum chamber systems include a transparent jar and gasketed vacuum plate with a tubing adapter that fits 6.4 mm inner Ø tubing. Transparent. PC or PEI jar. White PP or white PC plate. Vacuum chamber systems include a transparent jar and gasketed vacuum plate with a tubing adapter that fits 6.4 mm inner Ø tubing. Transparent.