SuperDuPer DP Tubes have a 1.0" inside diameter which is enough space to hold up to 5 #13 needles. Our original DP Tubes have a 5/8" inside diameter and they can hold up to 5 #10 needles. SuperDupers are based on a telescoping paper tube design just like our other tubes. They will hold up to 10" long needles. Paper color is purple and yellow and is glossy. SuperDuPer DP Tubes™ are Purple and Yellow."