材質(zhì)PP或者PE，食品級，7cm長，外徑12cm，內(nèi)徑9.5cm，兩端用塞子塞住，塞住時要求密封不透氣

We need PP or PE Tubes, round, transparent, both sides closed by flaps (corks) - when the tube is closed it has to be completely airtight, so the flaps should fit the tube well. Tube size: length 7cm, external diameter 12 mm (around 9.5 mm inside, so the wall thickness should be around 1.25 mm).

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