Designed to cover opening between base angles of CPI's Two-Post Standard Rack, KoldLok® Two-Post Rack Grommets form tight seal around cables, allowing cables to pass between base angles of rack, while preventing dust from collecting between base angles and blocking airflow. Durable sealing materials will not break, stretch, tear, or deform from repeated use. With split design, grommets install by snapping onto base angle of rack.