Per Conductix-Wampfler: In our continuing effort to improve the value and performance of our conductor bar systems, components made from 583.0F die-cast aluminum on several of our collectors are being replaced by a high-strength fiberglass-filled polymer material - trade name Grivory GV-5H Black 9915. The collectors affected are listed on this PDF download:
COLLECTORS - PRODUCT CHANGE
Please note, if you are operating a system in higher temperatures over 200F degrees, Conductix recommends going to their stainless steel collector assemblies.
8-Bar, Side-Contact, Hevi-Bar II, and Safe-Lec 2 (# 34956) Collector Components are Changing from Cast Aluminum to High-Strength Fiberglass-filled Polymer.