The Collars, H 60-90, are designed to connect waterproof membranes with through pipes and installations, guaranteeing strength and flexibility even at low temperatures. With a perforated flange for better adhesion to bituminous membranes, they are compatible with APP, SBS membranes and bituminous coats. Collars, H 60-90, are used to connect waterproof roof membranes with any through pipes or installations in the roof. The slightly tapered tang facilitates their installation in through pipes. They have excellent resistance to deterioration caused by the sun, ozone and other atmospheric or chemical agents normally present.