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The 4MPL4 is a Plain Gauge Glass. This gauge glass provides a flat, pressure-rated viewing window for liquid level indication.Borosilicate gauge glass is valued for borosilicate construction for thermal shock resistance and clear, direct visual indication of liquid level. The compound resists chemical attack from water and steam, thermal shock, and internal pressure.Maintenance and OEM teams specify it across water treatment, process tanks and vessels, and food and beverage processing.Reference part number 4MPL4 when ordering; the item is sold individually. Check the compound against your process media, pressure and temperature before committing to a design.