Protect shrimp and fish - The mesh of the filter cover is small, which can avoid sucking small shrimp and fish. Prevent clogging - Can prevent the suction of large debris and block the filter system. Application - Fine and smooth mesh can prevent baby shrimp or fish from being sucked into the filter and protect shrimp and small fish safely. Suitable for use in aquarium and fish tank. Easy to install - Easy to install and convenient to use. It is recommended to regularly clean the stains accumulated on the filter protection with a brush. Specifications - Package includes: 2PCS. Made of stainless steel. Sturdy and durable in use, compact and resistant to deformation. Internal diameter: 16mm, outer diameter: 30mm, length: 85mm. Weight: 16g per pcs.