Vial crimp seals, BiMetal (magnetic), 20 mm, with PTFE/silicone septa, pkg 100 red seal, septa (blue PTFE/white silicone), diam. x thickness 20 mm x 3 mm
The BiMetal caps are made of both tin and aluminum and are easier to crimp than tin 20mm seals. The sealing surface is aluminum and the inner diameter is made of tin to add the magnetic surface. These caps are available in a variety of colors.
Crimp seals (magnetic) with PTFE/silicone septa, pkg/100 gold seal (magnetic, with 8 mm center hole), PTFE/silicone (blue PTFE/white silicone), diam. x thickness 20 mm x 1.5 mm, open center