These biners weigh 35g, are rated to to 24kn major axis strength, come in bent straight and wire gates, have a pretty good size and a good rope radius. These are the same as the new Mammut biners and probably a few others' as well.
These are amazingly light (35g!) and very affordable ($5). I have these on the pro/bolt end of all my draws, which they are perfect for (I prefer a bent gate with a smoother action for the rope end). Swap 20 of these into a rack and you will feel the weight difference.