This is to certify that the management system of

MacLean Power Systems - York 7801 Park Place Road York, SC 29745-0949 has been assessed and certified as meeting the requirements of

ISO 9001:2015 This certificate of registration remains valid subject to satisfactory surveillance audits for the following activities: Design, Manufacture and Distribution of T&D (Transmission and Distribution) Products. Certificate Number: QSR-754

Certified since September 19, 2002

Date issued June 19, 2018

Date of certification June 18, 2018

Valid until June 17, 2021

This is to certify that the management system of

MacLean Power Systems 3098 Pelham Parkway Pelham, AL 35124 has been assessed and certified as meeting the requirements of

ISO 9001:2015 This certificate of registration remains valid subject to satisfactory surveillance audits for the following activities: Maclean Power Systems designs and manufactures distribution and transmission hardware, stringing equipment, and fiberglass insulators for the utility, communications and OEM markets. The scope of the quality management system includes the quality related activities at the following locations:

1) Design and manufacture of distribution and transmission hardware and stringing equipment at 3098 Pelham Parkway, Pelham, AL 35124.

2) Manufacture of distribution and transmission related castings and fiberglass insulators and related products at 1909 Highway 87, Alabaster, AL 35007. Certificate Number: QSR-969

Certified since May 22, 2012

Date issued May 2, 2018

Date of certification May 22, 2018

Valid until May 21, 2021

PERRY JOHNSON

REGISTRARS, INC.

MacLean Power Systems1465 Industrial Drive, Trenton, TN 38382 United States

ISO 9001:2015

Design and Manufacture of Transmission, Distribution, Substation Products, Earth Anchor

Systems, Installation Equipment, Anchor Systems for both the Utility and Civil Construction

Markets, and Steel Fabrication Products for the Utility and Communication Markets

Perry Johnson Registrars, Inc. (PJR)

755 West Big Beaver Road, Suite 1340

Troy, Michigan 48084

(248) 358-3388

Terry Boboige, President

The use of the UKAS accreditation symbol is in respect to the activities covered by the Accreditation Certificate Number 0105.

September 15, 2018 July 20, 2018 October 18, 2021 C2018-01148-R1

Maclean Senior Industries, Inc.610 Pond Drive,

Wood Dale, IL 60191USA

Has implemented and maintains a Quality Management System that meets the requirements of ISO 9001: 2015.

The scope of registration includes:

Designer, manufacturer and supplier of standard custom electro-mechanical components to the telecommunications and other industries with emphasis on

switches, jacks, connectors, magnetic products (transformers, chokes, coils), plugs, cable assemblies; and outside plant hardware products to the telephone, CATV and

utility industries.

Through an accredited audit process, it was verified that the management system fulfills the requirements of the following standard:

ISO 9001 : 2015Certificate registration no. 2018 - 540

Date of Certification 2018 - 08 - 27 Valid Until 2021 - 08 - 27

CERTIFICATE OF REGISTRATION

Thomas RichardsonPresident

IsoTec Alliance, LLC 2643 Ellington Street, Concord, NC 28027

IsoTec Alliance, LLC