300pcs Aquarium Pond Bio Balls Canister Filters Media Marine Reef 16mm UK
300 Bio Balls. Stainless Steel 9" Boat Polished Marine Grab Handle Handrail Yacht Accessoy. 1 Pair MTB Bike Brake Levers Set Shifter Shift for Shimano ST-EF500 3x8 Speed UK. Biological ball is a hollow sphere made of plastic material.