This air pump is ideally suited to supplying air pressure to under gravel and box filters, air stones and protein skimmers which use ceramic air stones. 

Features

 Long life and low-frequency operation for continuous use.
 Locate Unit above Water Level to Prevent Water Flowing Backwards (or fit with a non-return valve)
 Flow controller
 Free Air Stone (A-001 - 25 (L) x 12mm (D) ) x 1
 Free Air Hose (6mm) x 2m
 Free Non Return Valve x 1