Irrespective of the plastic I wouldnt touch it as the non rotateable head means that driving in heavy rain you will probably get water down it and into the airbox - cue rusted air filter or worse (I made the mistake once with my southdown one when I forgot to rotate the head around)
Personnally I dont think u can beat a southdown snorkle, I have one from their seconds store on ebay, cost about the same and is superb, Much slimer and better fitting in my opinion.
Cheers
Ryck