Qzbhct 5.9″ Big Prefilter Sponge Foam Replacement Filtration Kit for Pond Aquarium Fish Tank, 6 Pack

Suitable for: Provide filtration in fish tank, turtle tanks, terrariums and pond filter. Eg. fit for Eheim 250-600, CF-600-1200 Advantage: The Replacement Foam Pre-Filters Fits inside your Pre-Filter or water garden pump pre-filter to help reduce pump clogging Approx Size: Inner Hole Dia: 2cm/0.8″; Outer Dia: 6.5cm/ 2.6″ Easy to replace: Easy to use, sponge cover directly onto the water inlet of your filter One hole: These foam are pre filter sponges,so only have single hole.