Phelps Style 2024 is comparable to GFO^® fiber in performance but at a lower cost - Testing between 2046 and GFO^® fibers show equivalent performance - Tests include leak rate, heat transfer and elevated temperature yarn shrinkage.

Centerlock® braided from pure CPL fiber - Carbon, a high purity graphite;PTFE; and high temperature inert Lubricant. This unique packing has a graphite content of over 50%. That means CPL fiber is one of only two yarns to achieve this high graphite content. The end result of this high graphite content is longer wear, better heat transfer, and a broad pH range. Less than 50% PTFE in the yarn makes this packing kinder to the shaft while retaining good abrasion resistance.