also prevents the cones 220 225 and sealing member 210 from rotating during the mill up operation which significantly reduces the required time to complete the mill up operation the cones 220 225 then transfer the axial force to the sealing member 210 to compress and expand the sealing member 210 radially the expanded sealing member 210 effectively seals or packs off an annulus formed between the body 250 and an inner diameter of a surrounding tubular the non metallic element system 200 can be used on either a metal or more preferably a non metallic mandrel the non metallic element system 200 may also be used with a hollow or solid mandrel for example the non metallic element system 200 can be used with a bridge plug or frac plug to seal off a wellbore or the element system may be used with a packer to pack off an annulus between two tubulars disposed in a wellbore for simplicity and ease of description however the non metallic element system will now be described in reference to a frac plug for sealing off a well bore fig5 is a partial cross section of a frac plug 300 having the non metallic element system 200 described above in addition to the non metallic element system 200 the frac plug 300 includes a mandrel 301 slips 310 315 and cones 320 325 the non metallic element system 200 is disposed about the mandrel 301 between the cones 320 325 the mandrel 301 is a tubular member having a.