1000ml PYREX GLASS ERLENMEYER 4980 FLASK + FERMENTATION AIRLOCK, BREW YEAST STARTER KIT INSTRUCTIONS DRILLED STOPPER Included: (One) 1000 ml Pyrex Flask 4980 (One) Fermentation Bubbler / airlock (One) Drilled fermentation stopper (One) My famous Yeast starter Instructions for beer Condition: See photos. Cleaned and ready to go. May show some wear from use, but works great. This flask has been used about 7 times for making yeast starters. It has been cleaned after every use and is the real deal - can go straight from the stovetop to an ice bath and will not crack! Note: there are pros and cons for using an airlock or tinfoil. I use an airlock because bacteria can get into the starter when you use tinfoil. If you want to risk using tinfoil, you can use the airlock for the fermentation process or for both. ANY WEIGHTS OR DIMENSIONS PROVIDED ARE APPROXIMATE - FOR ADDITIONAL MEASUREMENTS OR WEIGHTS OR CONFORMATION OF SIZES PLEASE CONTACT ME this link to get the Bonus GET up TO $30.00 BONUS AND up to 15% CASH BACK.