YMY Measuring Reel Steel/Nylon Metric 10mm x 30-100mDesigned for drastic improvement on working efficiency, Yamayo 3X series tapes feature 3x the winding speed of conventional designs. Their special Stilon tape uses a nylon laminate over a steel core for minimal deformation over the lifetime of the tape, wrapping around the edge to protect from all directions, and the clear coating allows for easy cleaning. All Yamayo tapes are JIS Grade 1 for precision. 10 x 0. 5 mm tape, 50 N yield strain.