PTFE Combination Mixed Stirrer Bar-Set, for Lab & Industry, L2~60mm, 28pcs/set Excellent for Chemical and Corrosion Resistance, PTFE 마그네틱바 종합세트 PTFE Combination Mixed Stirrer Bar-Set, for Lab & Industry, L2~60mm, 28pcs/set Excellent for Chemical and Corrosion Resistance, PTFE 마그네틱바 종합세트