Sanitary Manhole Cover(oval manways, side manways) Export to USA, UK., tank manufacturer since 1996. ISO9001- ... 2008 APPROVED! Sanitary Manhole Cover(oval manways, side manways) Dimensions: 565*430*120mmThickness: neck 5mm, cover 4mmPressure: -0 ... and dairy and chemical industry, Sanitary Manhole Cover(oval manways, side manways)