Aion Co., Ltd.

Yoichi Tanaka

Hiroshi Miyaji

Noriyoshi Okuzono

A core for a cleaning sponge roller and a cleaning sponge roller set include a core and a cleaning sponge roller mounted on the core. The core for the cleaning sponge roller is in a substantially cylindrical shape including a bore extending in an axial direction and a plurality of small holes communicating between the bore and a circumferential outer surface of the core. The diameter of the bore is 10 mm or more. The diameter of the small holes is 2.5 mm or more. A total of cross-sectional areas of openings of all the small holes is larger than a cross-sectional area of the bore.

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Koga, Japan

Yoichi Tanaka