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Consists of a strong paper, telescopic tube with closed ends. Its diameter is wide enough to hold five 6mm needles (or many more smaller needles or 2 to 4 larger needles). The Tubes can also extend to hold 10" long needles and shorten to a total length of 6-1/2". They have inside diameters of 5/8" and outside diameters of approx. 3/4"