Item Type: Aquarium Filter Cover Material: Stainless Steel + Rubber Applicable Scene: Freshwater and marine fish tanks. 1Effectively prevent small shrimps and small fish from inhaling and extend the service life of the filter material in the filter. 2The product is easy to operate, just need to put it in the corresponding pipeline and it can be used normally. 3The dense openings and fine pores ensure that even newborn fish and shrimps cannot be sucked into the filter. 4Stainless steel variable diameter design intubation and internal roughening treatment make the protective mesh more stable. 5Professional design and scientific structure make this protective mesh a perfect substitute for old or broken ones.There might be an error of 0.5?2mm.1 x Aquarium Mesh