Inspiration 3088 Clear, Semi-Matt Anti-Slip (R9): An R9 slip rating is more than adequate for domestic and commercial applications where a safety floor is not required. Inspiration 3089 Clear, Satin Anti-Slip Extra (R11): An R11 slip rating is an even stronger resistance against slipping, can also be used on sloped surfaces or ramps. Inspiration 3094 Black Matt Anti-Slip (R9): An R9 slip rating is more than adequate for domestic and commercial applications where a safety floor is not required.