a shaft body;

an elastic body layer formed on an outer circumferential surface of the shaft body; and

a surface layer formed on an outer circumferential surface of the elastic body layer, wherein

the elastic body layer contains silicone rubber, and comprises a plurality of large protruding parts having a width of 13 μm or more and 48 μm or less and a height of 5 μm or more and 13 μm or less on the outer circumferential surface of the elastic body layer, and a plurality of small protruding parts forming unevenness having a ten-point average roughness Rz of 1.0 μm or more and 6.0 μm or less on a surface of the large protruding parts, and

the surface layer contains a urethane polymer, and has an elongation at breakage of 285% or more and 525% or less.