2muchplay on 2/6/2018
They are on a premade racket someone at my club bought (on another premade-only blade with 'Joola Steffen Fetzner Salto' on the lens, probably a crappy stock wood blade).
These are crappy rubbers like on most other cheap 'pro look' premade rackets (Butterfly Addoy, Tibhar Norm, etc.), but honestly they are at least very consistent and durable (this guy has used this for almost a year and it's still the same). I also like that unlike many other cheap rubbers on premade racket, even if they are bad, this one does not become even worse (many rubbers basically become an anti-rubber, losing any grip), and the sponge is quite soft but remains firm.
You can learn strokes very well with this and if you put in the strength and technique you will get OK speed and spin, but if you are truly serious about improvement as a low level player you can build a much better custom racket for almost nothing online with Chinese training rubber (ex. Sanwei M8 + 2x Yinhe 9000).