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I acquired my Kong Chuy #940 from Outdoor Outpost in 2007.
The Kong Chuy #940 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. This Kong Chuy has a flexible, plastic-covered, cable keeper.
One side of my Kong Chuy #940 is marked with the Kong logo, while the other has two rigging icons, one showing the high friction arrangement with "+," underneath, and one one showing the low friction arrangement with "-," underneath. The second side is also marked "063906 06."
The following closely-related belay tubes include the Kong Chuy #940 as an example:
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Each of these is 55±1 mm. long and 47±1 mm. wide, and has a weight in the 54±3 g. range. Their slots are all 35±1 mm. long and 16 mm. wide. The main differences are that most have cable keepers and U-shaped notches on both ends, but some have rod keepers and V-shaped notches on the high end.
These have several distinctive features, but overall, perform like most devices of this type. The rope slots are hour-glass shaped, but this does not appear to affect their performance. They are slightly asymmetrical with a high and a low end, giving two distinct riggings. 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.
Most of these have shallow U-notches at both ends. The Clog Flyer, Ellis Brigham Climb and Unknown have V-notches at the high end, so I call these notched belay tubes. The V-notches are not as tall and acute as those on the Trango Jaws and its equivalents, so they do not provide as much braking. The U-notches on the others are are too shallow to noticeably amplify braking.
I prefer the ones with the rigid rod keeper. For the others, the plastic-coated cable keeper is moderately flexible, but stiff enough that it tends to stay out from under the rope.
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I acquired this Kong Chuy #940000 from Miles Bradshaw in 2023.
The Kong Chuy #940000 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. My Kong Chuy #940000 has a stiff, plastic-covered, cable keeper.
One side is printed with "174664 17 0247," the Kong logo, a rigging icon, "-," "CHUY," and "940000." The other side is printed with "∞Ø 7.8÷8.9," "½∞Ø 8÷8.9," "1∞Ø 9.8÷1.4," rigging icon, "+," "EN 15151-2:12 TYPE 2," and a book-with-an-"i" icon.
The Kong Chuy #940000 is one of the following essentially identical notched belay tubes:
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Each of these is 54±1 mm. long and 45±1 mm. wide, and has a weight in the 60±7 g. range. Their slots are all 35 mm. long and 16 mm. wide.
The shallow V-notches used in this design do not seem to be very effective at increasing the braking force. The notches do not have the narrow angle found on the Trango Jaws and its equivalents, so they do not create the same wedging action. Spreading the friction helps with heat dissipation, but like all belay tubes, these can get quite hot when used for rappelling.
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