DacroGen™ is a durable, 100% high-performance polyester fiber coated and waxed for make your own DIY bowstrings. Our low-stretch polyester is faster than ever, but still safe to use on any bow, new or old. -Low stretch polyester. -Waxed with specially formulated wax for better manipulation when assemble the strings or twist flemish style. -Waxed uniformly throughout the beginning to end of the spool. -Great performance on any recurve bow or longbow , new or old. -Recommended strands for recurve or longbows : 10 to 16 strands -250 meters spools. Enough for made more than 12 strings for 68" and 12 strands ) -100% european product.