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The Holdrite HFPE4 is a HydroFlame Pro Series extension sleeve designed for use with #4 firestop sleeves and #5 hollow sleeves. This product can extend the height of HydroFlame Pro Series sleeves by up to four and three-quarters inches in one-quarter inch increments.
This extension sleeve effectively connects to safety caps, water dams, and water modules. It meets the requirements for installations over concrete pours and is suitable for various sizes of HydroFlame Pro Series sleeves.
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