At that time they were not available in the US. I was in Caracas-Venezuela and I bought it can you believe.It is not easy to get then in the U.S.A(Boston,New York,Miami,Seattle)
GUM Go-Between Angle Cleaners
Excellent supplemental tool for dental hygiene. Effectively removes food particles not removed by ordinary brushing AND not consistently removed by typical flossing after brushing, especially in hard-to-reach (molar) teeth. Other GUM Go-Between cleaners also effective, but I like this one because of the longer handle. Ordered online because this particular product is no longer available in local stores (CVS, Walgreen's, Publix, Walmart).
gum go between angle cleaners
I first found these angled brushes about ten of more years ago in Japan. At that time they were not available in the US. I was thrilled when they were made available here as these are, by a huge magnitude, better than any other go between brush. The angle and the length are perfect and the handle is squared so that it does not slip in wet fingers.