Metal internal and ABS plastic External, feel smooth in your hands Includes 10 individual needle size to fulfil different needs Metric sizes are marked on needle tips Each color for each size, bright color, easy to identify Whole Length: .26.2cm/ 10.31" This set of 10 sizes superior quality ABS Plastic knitting needles with single point. Nice needles with smooth . The more you knit with them, the more you will love to knit. Needle Length: . 25cm/ 9.84" External Material: ABS plastic Internal Material: Steel Wire Count: 20 pcs (2 piece for each size) Color: Send in random Size Chart: Metric Size(mm) 2.0mm,2.5mm,3.0mm,3.5mm,4.0mm,4.5mm,5.0mm,5.5mm,6.0mm,6.5mm US Size 0,1.5,-,4,6,7,8,9,10,10.5 Package Includes: 20 x Knitting Needles Note:Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.