Our USA Laboratory Stopcock provides on/off control with the main male barb valve. Which allows delivery of preset volumes of gases or liquids to reactions using the needle valve.
We ship all glassware products with additional care, but sometimes they arrive broken. If glassware arrives broken, please contact us within 3 days of receiving your product and we will either send you a brand new piece or send you a refund! Any glassware broken after that voids all warranties. Thank you for understanding!
For Technical Support, Questions, or Other Issues Please Email or Call Us!
Glassware does NOT carry any warranty. Glassware items with a defect or other issue must be identified within 3 days of arrival and USA Lab MUST be contacted. After 3 days, there will be no replacements sent for glassware items with a defect or issue.
