2-Pack Marina Carbon Aquarium Filter 192551447202 They are made of pleated

They are made of pleated paper which arrests various types of suspended materials

Helps prevent deposits and sludge build-up to enable long engine life

Replacement Spring Fits SS-11

Safety Stop: Yes

2-Pack Marina Carbon Aquarium Filter 192551447202 They are made of pleatedEffectively removes heavy metals, odors, discolorations, organic contaminants and pollutants Produces crystal clear and sparkling results High quality, long lasting pelletized carbon Does not raise phosphate levels Includes 2 carbon pads, 260 g (9. 1 oz.) each Marina Carbon effectively removes heavy metals, odors, discolorations, organic contaminants and pollutants and leaves your aquarium water crystal clear and sparkling. This high quality and long