PROMASTOP®-IM Cbox 125 is an intumescent sealing system for single or bundled electric cable penetrations through compartmentation walls and floors. It is always possible to re-assign cables after installing the cable box. Suitable for cable group 1 (cable diameter ≤ 21 mm), it has been tested to provide up to 120 minutes of fire resistance.

Visit link to find out more: https://www.promat.com/en-sg/construction/products-systems/products/fire-stopping/others/promastop-im-cbox-125/