Holdrite 2-1/2"-4" Extension Sleeve for #4 Firestop Sleeve & #5 Hollow Sleeve

Features: Used with #4 firestop sleeves and #5 hollow sleeves Extends the height of HOLDRITE HydroFlame Pro Series sleeves by as much as 43/4 in 1/4” increments No coupling needed for connection to sleeves Ideal for use on concrete pours over 12” Available for all HOLDRITE HydroFlame Pro Series sleeve sizes Connects to safety caps, water dams, water modules and underside of sleeves