Brand Name: NONE High-concerned chemical: none Origin: Mainland China CN: Jiangxi Battery Included: no Material: Plastic Type: fish Product name: Aquarium gravel cleaner head Use for: Fish tank sand washer Interface size 1: Inner diameter 14mm Interface size 2: Outer diameter 18mm Meterial: BC plastic Fit for: Water changers Function 1: Aquarium cleaning tools Function 2: Fish tank accessories Choice: yes semi_Choice: yes