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I'm looking for a reliable supplier for ultrasound transmission gel. The gel should be packaged in 250ML tubes and must meet specific criteria: it should be water-soluble, non-irritating to the skin, and formulated to avoid staining clothing. Additionally, it's important that the product is easy to clean up after use and free from formaldehyde. Please provide information on your product specifications, pricing, and availability. Looking forward to your prompt response!