its diameter range: 3--8mm, length: 6--20mm. diameter ?4mm,length 10—20mm is normal product and have lots of storage. Density of stack: 350kg/m3, theoretic plate number: 10—20/meter. Up-to-now we offer two kinds of material: one is normal glass, two is GG-17(such as pyrex). it can be made according to customer’s requirement, its diameter range: 3--8mm, length: 6--20mm. diameter ?4mm,length 10—20mm is normal product and have lots of storage. Density of stack: 350kg/m3, theoretic plate number: 10—20/meter. Up-to-now we offer two kinds of material: one is normal glass, two is GG-17(such as pyrex). it can be made according to customer’s requirement, its diameter range: 3--8mm, length: 6--20mm. diameter ?4mm,length 10—20mm is normal product and have lots of storage. Density of stack: 350kg/m3, theoretic plate number: 10—20/meter. Up-to-now we offer two kinds of material: one is normal glass, two is GG-17(such as pyrex). it can be made according to customer’s requirement, its diameter range: 3--8mm, length: 6--20mm. diameter ?4mm,length 10—20mm is normal product and have lots of storage. Density of stack: 350kg/m3, theoretic plate number: 10—20/meter. Up-to-now we offer two kinds of material: one is normal glass, two is GG-17(such as pyrex).