... tank manufacturer since 1996. ISO9001-2008 APPROVED! Sanitary Manhole Cover(pressure manhole, sight glass)Dimensions: 250*100mm -600*120mmThickness: neck 5mm ... ss316LApplication: beverage, food, diary, beer, water industrywe have 18 designs and more than 100 specifications, they have 3 figures(will ... beer, pharmacy and dairy and chemical industry, Sanitary Manhole Cover(pressure manhole, sight glass)