Filtering Flask, 250ml, borosilicate glass 50ml graduations, integrated side arm EISCO Filtering Flask, 250ml, borosilicate glass ( Single Flask) 50ml graduations with integrated side arm. Made with High Quality Borosilicate glass Product Details BrandEISCOManufacturerEISCOMpnCH0420B 250ml Filtering flaskHigh Quality Borosilicate glassFiltering flask with integrated side arm adaptable to 3/8″ internal diameter tubing(1) Single Flask250ml with 50ml graduations Check out my other items. -Powered by