They are installed on my drumkit for over 2 years Submitted!
These are solid skins, ideal for rock drummers and metal. They are made of two layers with them a thin layer of oil which allows for an optimal sound Resistors very strong.
However the rsonnance is somewhat reduced and less power in the (o of the 8 / 10), but it will default inaperu if one takes the trouble to pair it with a rsonnance thin skin and good quality.

Given life, the report qualitprix is ​​very good!
I do it again this choice without hsiter.