Product Name: Clear Borosilicate Glass Test Tubes Technics: Tubing Flexibility: Hard Recycled: Unrecycled Logo Printing: Without Logo Printing Application: for Producing Medicine Container Type: Tube/Tubing Material: Glass Glass Type: USP Type I Glass Color: Clear and Amber for: Pharmaceutical Application Trademark: LUMENG Transport Package: Glass Bale, with or Without Carton Specification: diamater from 10 to 32mm Origin: China HS Code: 70023900 Product Description Clear Low Borosilicate Glass Tube for Injection Test TubesPharmaceutical Tubular Glass Tubing1/ clear and amber2/ USP type I3/ for vial4/ for ampoule5/ for syringe6/ for cartridge7/ outer diamater: 10mm - 32mmNo.Physics PerformanceNumerical ValueUnit1Medium coefficient of linear expansion α20/300 as per DIN 523283.30.110-6 K-12Transformation Temperature52515ºC3Viscosity temperatures (dPa·s):1014.751010ºC1013.2 upper annealing temperature56010ºC107.5 softening point82010ºC104 working temperature126020ºC4Maximum short-time working temperature500ºC520ºC Density ρ2.230.02g/cm36Modulus of elasticity E64103 N/mm27Poisson's ratioμ0.2018Thermal conductivityλw(20ºC-100ºC)1.2W/m2K9Temperature for the specific electrical resistance of 108Ω·cm(DIN52326)tk 100250ºC10Electrical volume resistance logarithm(Ω·cm)At 250ºC8At 350ºC6.511Dielectric Properties (1MHz,25ºC)Dielectric figureε4.61Dielectric loss factor tanδ3710-412Refractive index(λ=587.6nm)nd1.473113Stress-optical constant(DIN52314)K4.010-6mm2/NPUYANG LUMENG GLASS PRODUCT CO., LTD.Add.: Puwang Industrial Park, Fanxian Industries Clusters ZoneFanxian, Puyang, Henan Province, China