2mL, 12 x 32 mm, 11 mm Crimp top vials · 11mm aluminum crimp top seals have a larger opening to ensure proper needle penetration. · 2ml, 12x32mm vials are manufactured of Clear, borosilicate, or Amber borosilicate glass and include an optional write-in patch for sample identification · Caps are made of high quality aluminum, .010" thick.