| NASC’s line of Brass Bottle Switches are designed to be installed external to ships and industrial tanks. It may also be bolted to an adjoining structure. Custom configurations are available upon request. Specifications regarding this model may change without notice. BTL-100/25BBS | |
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| BTL-150/25BBS | |
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| BTL-200/25SSS | |
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| BTL-400/25SSS | |
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| BTL-450/25SSS | |
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