Knitter-s Pride Trendz Interchangeable Sets Trendz needles are made from superior quality acrylic material and offered in a riot of colors. These lightweight needles are ideal for new knitters as well as the more experienced hand who likes a smooth surface. 3 pairs of Interchangeable needles US 13 (9.0 mm) US 15 (10.0 mm) US 17 (12.0 mm) 3 Cables (to make 24'', 32'', 40''') 6 End caps 3 Cord keys