【Plastic material】 This product adopts a durable plastic material for long-term use. 【With suction cups】 can be floating or fixed to the wall of the aquarium with the suction cup. 【Product application】 Perfect to feed red worms, red earthworms, etc. 【Avoid wasting food】 Can prevent waste from feeding too much or changes Ecological of the aquarium. 【Anti-dispersion】 Prevent the living food from dispersing in the aquarium or flow to the bottom before being eaten. Specifications : Material: plastic Color: In pictures Diameter: 6.5cm Height: 7cm Quantity: 20pcs / bag Package weight: 160g Type: Fishourissener The package includes: 20 x Feeders