Round Bottom Flask Capacity - Metric 50 mL Capacity - English 1.7 fl oz Flask Type Boiling USP Specification Type I Includes Closure No Closure Type Stopper Neck Style Angled Closure Material No Closure Compatible with Stopper Size 19/22 (Center Joint) 19/22 (Side Joint) Body Material Borosilicate Glass Sterile/Non-Sterile Non-Sterile Autoclavable Yes Body Color Clear Graduated No Graduation Increments - Metric Not Applicable Glassware Class A ASTM Specification E438