I acquired my Simond Tubik from Expé-Spelemat in 2008.
The Simond Tubik is forged from aluminum alloy and then soft anodized. Mine is 56 mm. long, 47 mm. wide, 101 mm. high, and weighs 57 g. The slots are 35 mm. long and 16 mm. wide. The top of the Omega oval carabiner that I use for comparing belay tubes sits 7 mm. below the ends of the slots. The Tubik has a flexible, plastic-covered, cable keeper.
One side of my Tubik is marked with the Simond logo and the word "Simond,, while the other has a "-" inside a circle and a "+" inside another circle.
The Tubik has several distinctive features, but overall, performs like most devices of this type. The rope slots are hour-glass shaped, but this does not appear to affect their performance. The Tubik is slightly asymmetrical, giving two distinct riggings. One would expect a difference in friction for the two riggings as the "+" and "-" markings suggest, with more friction if the braking line runs over the shorter end; however, I do not notice much difference. The plastic-coated cable keeper is moderately flexible, but stiff enough that it tends to stay out from under the rope.
The Simond Tubik is essentially the same as the Climb Axe Max, Kong Chuy, Mad Rock Max Air and Ocùn Tuber.