The IPC Eagle Pulex Rubber consists of vulcanized natural rubber that is compression molded. Pulex rubber is available in a 12 pack as well as a gross pack (144 pieces). It comes in both soft and hard varieties and in various standard sizes up to 36 inches. The Pulex Soft rubber is best for normal to cold temperatures. The Hard rubber is more ideal for hot and humid temperatures. Both rubber options will fit most standard channels. Pulex rubber remains consistent in delivering excellent streak free results for professional window cleaners. Window Cleaning Resource also carries Pulex channels.