... that fungus craft to extensively. 1.staining tube has a core,2core,5core,7core,9core,11core,13core,more than 15core 2 ... .according to stain core length have 10"20"30"40" 3.stain core material have polytetrafluoroethylene(PTFE),polysulfone,nylon ... of minority nationalities the swimming skill (suitable for the liquid)strain the core,but the root ,according to needing selecting for use.