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Focevi Swim Snorkel for Lap Swimming

$35.99

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  • Swim Snorkel for Lap Swimming Swimming Snorkel Training in Pool and Open Water

    5. How to judge whether it is a food-grade silicone mouthpiece or not?

    Method for identifying food-grade silicone and ordinary silicone:(1)Look: Food-grade silicone is liquid silicone, which looks very glossy and bright, while ordinary silicone is solid silicone, which looks dull and not bright; (2) smell: food-grade silicone has a faint odor at most, and gradually disappears with time, while ordinary silicone has a pungent odor and does not disappear with time. (3):Stretching: Stretching silicone products, the color of food-grade silicone will not change substantially, while ordinary silicone products will appear a lot of white spots, the whole silicone products show a white color phenomenon; (4)touch: food-grade silicone feels very smooth, ordinary silica gel feels rough.

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