Construction: Made from robust Polyester Filament with a protective PP cover, this component is built to withstand long-term use in diverse weather conditions.gned for Bio Wheel Assay 200b 350b (Aquaria) Replacement Compatibility: Designed as a replacement part for Penguin 200 350 Power Filter#PRIM350B, improves the aquarium filtration through the system. Simple Installation: Power filter for 350B install without the need for any special equipment, ensuring the wheel rests securely within the bearings. Note: Occasional irregular rotation of the wheel is normal and expected. Simple Installation: Power filter for 350B install without the need for any special equipment, ensuring the wheel rests securely within the bearings. Note: Occasional irregular rotation of the wheel is normal and expected. Color: As shown Material: plastic Package Contents: 4*Aquarium Filters Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.