Lego Support 2 x 2 x 2 Stand with Blind Hole 3940a

Lego Support 2 x 2 x 2 Stand with Blind Hole 3940a. These were found in sets 6970, 926, 924, 928, 7740 and 918. They are quite delicate so your original pieces may have been broken over the years. These are the original parts from 1979-1980.