Black Silicon rubber spacers has more spring-like properties and allows more flex between holster/sheath and belt clip and has no memory. It can tear when cut but it's not likely because of the thickness and density.
Black EPDM synthetic rubber spacers are very tough and rigid and will not tear. It allows less flex between holster/sheath and belt clip, but has memory.
Black EPDM synthetic rubber spacers are very tough and rigid and will not tear. It allows less flex between holster/sheath and belt clip, but has memory.