[hmps] doors / windows and ventilators. Are made from 1.25 mm thick crca sheets. The doors can be of single sheet or sandwiched type. Sandwiched doors come in flush or rib-type. Both sheets can be of 1.25 mm thickness. They are glass wool, thermocole and rigid polyurethene insulated. The glass is fixed betwwen a rubber beeding and an aluminim beeding. Fittings a can be of aluminium, brass, etc. The hmps windows come in openable or sliding type, whereas ventilators are either fixed or openable type having embedded safety bars. Nylon 6 bushings ensure smooth operation. The louvers can be adjusted ar a desired position to allow for varied degrees of light and air.
