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These heavy duty 250mL PYREX® round bottles can be used for storage as well as mixing and sampling. They include a linerless, one-piece autoclavable orange polypropylene plug seal GL45 threaded cap with a drip-free pouring ring. New glass bead indicates full capacity line. Bottles have permanent white enamel graduations and marking spots. -Caution: DO NOT tighten caps immediately after autoclaving as the vacuum resulting from cooling can cause breakage. -A wide range of optional caps are available for these bottles: -Polypropylene colored caps in a choice of orange, green, purple, red, and light gray for ease of sorting and identification. -Vented membrane cap with 0.22µm PTFE hydrophobic membrane. -Red PBT (polybutylene terephthalate) solid caps and ETFE pouring rings for dry heat sterilization (180°C). -PBT caps with silicone septa for syringe sampling or introduction of reagents.
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