5pcs 100mm Pyrex Glass Blowing Tubes Wall Test TubeSpecification:Material: Pyrex GlassOutside diameter:10mmInside diameter:8mmLength :100mmThick Wall:1mmFeature:Durable in use.Fire polished ends on Both Sides.Used as the reaction vessel in a small amount of reagent and used in room temperature or heat.The Pyrex Glass has low thermal expansion coefficient that is about a third of ordinary glass.Resistant to high temperatures(About up to 200 degrees)Package Includes :5pcs x Tubes