Bought this to replace old MPK roof light which had gone brittle over time. Overall this looks to be a much better quality and more sturdy product. Good price from Rainbow too.

Excellent service from Rainbow with super quick delivery - ordered Tuesday afternoon around 4pm arrived Thursday morning. Thanks.
Positive points on product - I bought this to replace the vent which blew off on the motorway on my 1986 Burstner Lux caravan. This vent has locking handles which the former vent did not so I am expecting it will be more secure than the last vent which was sprung but with no catch. This was the only roof vent I could find which fitted the hole in the caravan roof.
Slightly negative - I did have to modify the plastic base to fit the hole which admittedly is not the manufacturers fault so you may think it unfair as I have given it 4 and not 5 stars.