The FLEX-30 by CDVI is a 30cm metal door loop with an internal diameter of 7mm, safely transferring cables from point A to point B. FLEX-30 offers a safe and secure method of transferring cables from a fixed point, such as from the door frame onto the door leaf. With a metal loop for better protection, FLEX-30 has a minimum internal diameter of 7mm, which is sufficient to handle the most common cables used in door locking/control. 30cm door loop Ideal for cable/power management Easy to install 7mm internal diameter Economical and vandal resistant