Nova SM-201 Hydroulic 60Kg Door Closer (Silver) This door hardware is from the house of Nova. which is made of aluminum casting. The package contents are 1 complete set of door closer and fittings Constructed with extruded anodized aluminum body & high quality steel internal components with Stable hydraulic fluid for any climatic operation & constant lubrication as well as Piston & spindle been heat treated for high strength.