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I'm looking for a reliable source for air core inductors with a specification of 4.7uH. It's important that these inductors meet high quality standards, as they will be used in various electronic applications. Please provide details on the available options, including pricing, lead times, and minimum order quantities. Additionally, I'd appreciate any information on the materials used and whether these components are RoHS compliant. If you have datasheets or technical specifications, please include those as well. Looking forward to your prompt response to help facilitate my purchasing decision!