Item Name: Glassware 18mm Banger Glass Adapter Glass Tube Adapter 14mm Male Bowl Lab Glass. Use scenario: science laboratory or family giftShape: geometricMaterial: high boron glassProduction process: blowingSize: 18mm Female,14mm MalePackage Includes: 3*glass adapters from 18mm to 14mm3*glass adapters from 18mm to 14mm *Please make
