General description Micro Reaction Vessels are cone shaped inside for easy removal of small samples.They are made of heavy-wall borosilicate glass and are supplied with PTFE-faced red rubber septum and cap.This glassware can be autoclaved or centrifuged.The septa material can not be autoclaved..Graduated.Supplied with one compression cap,one Viton® O-ring,and one fluoropolymer resin-faced silicone rubber septum. ● Material:Borosilicate Glass ● Color:Clear ● Heavy Duty Reusable ● High resistance to heat,chemical attack,and mechanical shock ● Joint size:5/5、7/10、14/10 ● Capacity:0.1ml、1ml、3ml、5ml、8ml ● Joint size 7/10:7 refers to joint diameter,10 refers to joint height,other specifications and so forth