The NLR1825WS is a 25W UV lamp and goes in to a Wedeco Aquada Altima, Maxima or Proxima system that is a type 1. It's a high quality UV bulb that will last 1 year before it needs replacing. We keep plenty of these available from stock as they're such a popular lamp as well.
Please note that you'll only receive the parts in the option you select (so you won't get a quartz sleeve included if you choose "lamp only"). The quartz sleeve includes the O-ring at no extra charge.
UV lamps contain Mercury so need to be disposed of at your local recycling centre.