Spool of 10 Metres Stretch Magic Elastic Cord 0.5mm dia., black - strong and stretchy easy knot thread, for stretchy bracelets etc. This stringing thread is made to resist UV rays, which can make elastic brittle; it will also resist the degradation to stringing caused by perfumes, sweat and make-up (note the word resist, please do not spray perfume on your jewellery, ever!). Stretch Magic will not fray; no need to use clasps and do not use crimps. Use a dot of good quality glue on the knot which you should hide under a bead. Great for all ages and abilities