Ashaway Powernick 18 is the red Powernick squash string. It is thin but surprisingly durable and incredible stiff. This a great squash string for control and durability, despite having "power in its name.
Ashaway SuperNick ZX Micro is a nylon core multi filament string with a textured surface. The ZX layer helps to increase durability and tension maintenance. In addition, providing optimum ball feel, control, precision and spin potential.