TPE Non-Slip Grip Colored Insert The Rokform TPE non-slip grip keeps your phone from sliding across slick surfaces but doesn’t get caught up in your pocket. These come either with a circular depression if you would like your v3 to become magnetically mountable (magnet sold separately), or solid backed for non-magnetic use. Thermoplastic elastomer non-slip grip insert Replaces stock black insert for customization Fits all v3 cases Designed, engineered and made in the USA.