Holdrite® Extension Sleeve, Series: HYDROFLAME™ PRO, For Pipe Size: 4 to 6 in, For Use With: #6 Fire Stop Sleeve and #7 Hollow Sleeve, 5-5/16 in Height, Polypropylene
The Holdrite® HYDROFLAME™ PRO Series "Sleeve Extensions" (#HFPE1 - #HFPE6) are available to fit a wide variety of Sleeve combinations, from 1 in thru 6 in sizes. Each extension adds up to 4-3/4 in of height in 1/4 in increments. No coupling is needed! Height markings are shown on each part, in both U.S. and metric.