Map Extrusions Pvt. Ltd. Offers Unplasticized Polyvinyl Chloride 62 mm Multi-Chambered System. Map Extrusions Pvt. Ltd. Also offers PVC Doors and Windows. The Unplasticized Polyvinyl Chloride 62 mm Multi-Chambered System, under the brand name `Skylight` has a 15 degree bevel and comprises of a full range of interchangeable profiles which allows for internally and externally glazes casement windows, tilt and turn windows, residential door and double doors. The Unplasticized Polyvinyl Chloride 62 mm Multi-Chambered System has 3 mm wall thickness with sliding and casement. The Unplasticized Polyvinyl Chloride 62 mm Multi-Chambered System is simple to clean and is impact and UV resistant.