Tisch Scientific Cellulose Acetate (CA) Syringe Filter, 0.45 µm, 25 mm, Double Luer Lock, Sterile, 1000 Pack, SPEC18173. Regular Price: $1,666.00. Price $1,499.40. Add To Cart. Tisch Scientific Cellulose Acetate (CA) Syringe Filter, 0.45 µm, 20 mm, Threaded Double Luer Lock, Nonsterile, 100 Pack, SPEC18178.