Available thicknesses are 3µ and 6µ.
Bothe directions pre-stretched. One side c-treated for better gluing and/or coating. Very good shrinking properties.
Furthermore The 3µ type is the top solution for the dust cover of all Quad ESLs, because of its extreme damping factor, in comparison to PE//Mylar. No Eigentones will be added to the original panels signals. Peter Walker would have used this PP one, given ,it would already have been on the market at that time.