Doors with Portholeadmin2019-06-14T09:18:14+00:00 Project Description MOD. CD 80 B-GL to 0°C MOD. CD 80 S-Gl to 0°C MOD. CD-GLto 0°C Specifications: Hinged and Sliding doors with porthole. The porthole is made of triple glass for better sealing of cold rooms. Other sizes are possible.