The Edelbrock Elite Series Push-In Breather is made of die-cast aluminum with a foam element. It is polished to a high shine. It has an Allen head bolt-on cover for access to its internal foam filter. The top and base material is made of aluminum with a natural finish. Breather tube, PVC (Positive Crankcase Ventilation) valve and grommets are not included. The internal foam filter element will not leak or clog.