1. Material: stainless steel 2. Air inlet: 4MM 3. Air outlet: 4MM 4. Application: fish tank 5. Length: one head: 2.5CM, two heads: 5.4CM, three heads: 7.3CM, four heads: 9.5CM, five heads: 11.5CM, six heads: 13.4CM, eight heads: 17.2CM, nine heads: 18.2CM, ten heads: 20.6CM 6. Applicable objects: aquarium
