PROMASTOP®-IM CJ21 is a graphite-based intumescent cable sleeve designed to provide fire-resistant sealing for single electrical or data cable penetrations through compartmentation walls and floors. The sleeve has an outer diameter of 26 mm.

Visit link to find out more: https://www.promat.com/en-sg/construction/products-systems/products/fire-stopping/others/promastop-im-cj21/