I have three of these New Tech Kites deltas, one in each of the available colours, which I fly on one line. They are fairly small, at 64” wingspan, and of unusual design, with a tunnel keel which is said to improve stability. They are very well made, of ripstop nylon and carbon spars, and fly in winds from around 3 to 20mph.  I have found them to be very reliable fliers, and can certainly recommend them to anyone looking for a smaller delta that is going to last a long time and give a lot of satisfaction. Ideal as a first kite or for a child.  I bought mine from Windpower Sports at the reasonable price of US$39 each.