Filter Vials, 0.45um PTFE w/pre-slit cap, Thomson SINGLE StEP, Blue Cap: 100-- Add to Cart: RK25895 Filter Vials, 0.2um PVDF w/pre-slit cap, Thomson SINGLE StEP, Red Cap: 100-- Add to Cart: RK25896 Filter Vials, 0.45um PVDF w/pre-slit cap, Thomson SINGLE StEP, Yellow Cap: 100 . Captiva 0.45um PP 96 Well Filter Starter Kit