I got lost as hardness 60, but purchased 45. Approximately 10 mm bolt cut and mounted but sharperness improved dramatically. The MT shift knob vibration during idling also decreased. I think cost performance is also high.
Instead of fixing the duct of the air cleaner of the dump, it was attached instead of the metal fittings. Before mounting, the beeper sound was generated at the time of traveling, but after installation it became completely vivilla, became quiet,
This product seems to protect the device from small vibration, because it feels that the rubber is very soft compared to the conventional product (I think the rubber hardness is so soft as the rubber hardness becomes 60 to 45).