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APG stocks the 4MHP8, a High Pressure Gauge Glass. A gauge glass delivers durable visual indication in high-pressure steam and water service.Borosilicate gauge glass is specified for borosilicate construction for thermal shock resistance and annealed for consistent strength. This material stands up to internal pressure, thermal shock, and chemical attack from water and steam. Applications involving mechanical impact or service beyond the rated pressure and temperature call for a different compound.Common environments for this compound include food and beverage processing, boilers and steam drums, and process tanks and vessels.This item is sold individually under part number 4MHP8. Check the compound against your process media, pressure and temperature before committing to a design. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.