Gumijas auklas

A bungee cord (also known as a shock cord) is an elasticated shock resistant cord with a core formed from elastic strands. The outside of the core is covered in a water and abrasion resistant stranded woven braided sheath which spirals round the core. When the bungee cord is pulled the sheath squeezes the core to transmit the elastic compression of the core to the longitudinal extension of the ...