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Dwyer Manometer, range 36-0-36, 32 oz water or mercury required
https://www.branom.com/shop/1211-72-dwyer-manometer-range-36-0-36-32-oz-water-or-mercury-required-544361
https://www.branom.com/web/image/product.template/544361/image_1920?unique=c26756c
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