This 250 mL PYREX® replacement Kuderna-Danish flask has a 24/40 outer Standard Taper upper joint and 19/22 inner Standard Taper lower joint and includes a pair of 1 1/4 inch stainless steel springs.
EcoChoice Claim
I-RECS cover 100% of manufacturing electricity consumption
EcoChoice Narrative
One or more facilities manufacturing this product is 100% covered by renewable energy through the purchase of unbundled energy attribute certificates (EACs).