widely used, conveninence, cheaper size: 38*16, 40*16, 452*18, 45*20 and so onweight: from 20g to 50gcolor: white, blue, green, yellow, pink and so onmaterial: PP, PE+PP, SMS, PE, CPE, PVC and so onpackage: 100pcs/bag, 2000pcs/ctn, 100pcs/bag/box, 500pcs/ctn usage: widely used in hospital, clinic, lab, industiral, construction, home and so on