Anyone know what flash diffuser material this is?

[FiestaRed]

The guy in this YT video has made a flash diffuser for macro work. All he knows the material as is "PVC".

Does anyone know the proper name for the material here in the UK?

http://www.youtube.com/watch?v=wkTwBPvPSyM&list=FLWgjO5ugguZ3vfUJGyXQw9w

 

[terryt]

Frosted perspex? http://www.ebay.co.uk/itm/FROSTED-P...842?pt=LH_DefaultDomain_3&hash=item27b8aa20f2

 

[FiestaRed]

Thanks for the help Terry, I'll give it a try.