I acquired my Kong Chuy from Outdoor Outpost in 2007.
The Kong Chuy is forged from aluminum alloy and then soft anodized. Mine is 56 mm. long, 47 mm. wide, 98 mm. high, and weighs 51 g. The slots are 34 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 Kong Chuy has a flexible, plastic-covered, cable keeper.
One side of my Kong Chuy is marked with the Kong logo, while the other has two rigging icons, one showing the high friction arrangement with a "+" in a circle underneath, and one one showing the low friction arrangement with a "-" in a circle underneath. The second side is also marked "063906 06."
The Kong Chuy 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 Kong Chuy is slightly asymmetrical, giving two distinct riggings. These are screened on the side of the device. One would expect a difference in friction for the two riggings, 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 Kong Chuy is essentially the same as the Climb Axe Max, Mad Rock Max Air, Ocùn Tuber, and Simond Tubik.