Material: UL qualified NYLON66 (character),
Fire rating: 94V-0, not easy to aging, high insulation
Uses: 1. Expand the contact surface, reduce the tightening force on the fastener stress concentration, to prevent damage to the fasteners.
        2. Do not scratch the fasteners when tightening the nuts.
        3. The mats and spring mats also prevent the nut from loosening. The
Features: soft material, good sealing effect, easy to install.
Packing: 1000PCS