Are these cable glands really IP68 waterproof?

πŸ›  Need waterproof sealing? MAKERELE Cable Gland Plastic cable gland tool Nylon Waterproof IP68 Wire Glands Adjustable Locknut, with Gaskets passes IP68 and UL tests β€” See details β†’Yes. The PG-series glands pass a 5-bar / 30-minute immersion test (IEC 60529), keeping dust and water out of your enclosure.

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