▁fish ing ▁ro ds . ▁The ▁fib ers ▁can ▁be ▁produced ▁by ▁chemical ▁v apor ▁de position ▁of ▁bor on ▁on ▁a ▁t ung sten ▁fil ament . ▁ ▁Bor on ▁fib ers ▁and ▁sub - mill imeter ▁s ized ▁cry st all ine ▁bor on ▁spr ings ▁are ▁produced ▁by ▁las er - ass isted ▁chemical ▁v apor ▁de position . ▁Trans lation ▁of ▁the ▁focused ▁las er ▁beam ▁allows ▁production ▁of ▁even ▁complex ▁hel ical ▁structures . ▁Such ▁structures ▁show ▁good ▁mechanical ▁properties ▁( el astic ▁mod ulus ▁ 4 5 0   G Pa , ▁f ract ure ▁stra in ▁ 3 . 7 %, ▁f ract ure ▁stress ▁ 1 7   G Pa ) ▁and ▁can ▁be ▁applied ▁as ▁rein for cement ▁of ▁cer am ics ▁or ▁in ▁mic rome chan ical ▁systems . ▁ ▁Bor on ated ▁fi berg lass ▁▁ ▁F i berg lass ▁is ▁a ▁fi ber ▁rein for ced ▁polym er ▁made ▁of ▁pl astic ▁rein for ced ▁by ▁glass ▁fib ers , ▁commonly ▁w oven ▁into ▁a ▁mat . ▁The ▁glass ▁fib ers ▁used ▁in ▁the ▁material ▁are ▁made ▁of ▁various ▁types ▁of ▁glass ▁depending ▁upon ▁the ▁fi berg lass ▁use . ▁These ▁glass es ▁all ▁contain ▁sil ica ▁or ▁sil icate , ▁with ▁varying ▁amounts ▁of ▁ox ides ▁of ▁calci um , ▁mag nes ium , ▁and ▁sometimes ▁bor on . ▁The ▁bor on ▁is ▁present ▁as ▁bor os il icate , ▁bor ax , ▁or ▁bor on ▁ox ide , ▁and