This casing is a genuine direct replacement for the 15 and 25w versions of the Yamitsu Algae master ultra violet clarifier.
To fit the mega filter boxes
The physical dimensions of the Algae master 15 and 15 watt have not changed since it was first built, this casing is the most recent black colouration and replaces the white and grey types. All original parts are interchangeable so you can swap out the glass sleeve, lamp, screw caps.
The only thing you may need are new hose tails and tank connectors these are often glued in place and do not come with this body
Please note this is not the standard in line type body