... because it has good aging properties, tensile strength and spring-like quality.Ferrex provide the best shielding performance, especially ... core materials include neoprene (MIL-R-6130, Type 2) hollow solid neoprene (MIL-R-6855, grade 2), closed- ... cell silicone foam (AMS-3195) and solid silicone hollow Tube (ZZ-R-765, Level 2B)In addition to ... grille, you can get along plus 0.79mm. Rubber core mesh liner