Filtering flask with upper tubulature Used in the chemical industry, petrochemical industry, biochemical pharmaceuticals, laboratory and education. There are 8 sizes available : 125ml Filtering flask with upper tubulature, 250ml Filtering flask with upper tubulature, 500ml Filtering flask with upper tubulature, 1000ml Filtering flask with upper tubulature, 2500ml Filtering flask with upper tubulature, 5000ml Filtering flask with upper tubulature, 10000ml Filtering flask with upper tubulature, 15000ml Filtering flask with upper tubulature.