Companies

• Northern Industrial Supply Company

• Nu-Calgon Wholesaler

• Pemko Manufacturing Company

• Pittsburgh Corning Corp.

• Proudfoot Co.

• Reflectix Inc.

• Refractory Specialties Incorporated

• Repcor

• Rex Roto

• Robovent

• Rock Wool Manufacturing Co.

• Roxul Inc.

• Scott Manufacturing, Inc.

• Seal Master Corporation

• Steels Industrial Products Ltd

• TRUEBRO

• The Crosby Group, Inc.

• Thermacor Process

• Todol Products

• Trails West Custom Gate Company

• Tri-Boro Construction Supplies, Inc.

• URS Corporation

• Unifrax Corp.

• United McGill Corporation

• X-Pando Products Co.

• Zomeworks Corp.