Watts IPF S M1 1 Part of the IPF Series Egress System The fabric is constructed of The fabric is constructed of polypropylene and needle punched in a random pattern to provide a dependable level of permeability has a slotted design with openings that span the width of the grate and has an NDS Class E load rating when properly installed Specifications Actuation No Assembled Dry No Balance Stop Plate No Ball Material Chrome Plated Brass Body Finish Brass Body Material Brass Brand Watts Buy American Act Compliant NO Class Rating Does Not Apply To Product Control Type Lever Handle CV Rating Does Not Apply To Product EAN 098268344387 Electrical Rating Does Not Apply To Product Inlet Connection Size 1 IN Inlet Connection Size Metric 25 MM Inlet Connection Type Socket Inlet Thread Type Does Not Apply To Product Lead Free Not In Scope Maximum Temperature Fahrenheit 406 Minimum Temperature Celsius 40 It features a brass body and flange with bottom loaded blowout proof stem