Quad block are used for easy movement of cable into duct while passing over ground level or chamber wall.
Quad block consist set of bearing fitter roller, which reduce pulling drag caused while pulling through manhole.
This also protect cable outer sheet from being damaged by protecting it from getting in contact with chamber wall, other hard substance, there by increases pulling efficiency.
Standard quad block are available in 60° & 90° roller set. However custom manufacture can be done as per customer requirement. Contact us for more info.