white PTFE/blue Silicone septa, 20mm crimp blue magnetic cap,10mm centre hole . SC204202. nature PTFE/yellow Silicone septa, 20mm crimp blue magnetic cap, 10mm centre hole . SC205202. nature PTFE/blue Silicone septa, 20mm crimp blue magnetic cap, 10mm centre hole . VH1017. 10ml crimp headspace clear vial, flat bottom 22.5*46mm . VH2017. 20ml