... )Size and shape:according to your need 3)passed ROHS rubber wheel stopper CertificateISO9001:2000,ROHS,SGSTemperature range-40°C-100 ... °CUsagestop air,water,and dustTypeSolid rubber seal,sponge rubber seal,hollow rubber seal and composite rubber sealMaterial100% made of the SGS grade ... ,bottle stopper,bottle stopper,bottle stopper,bottle stopper,bottle stopper, rubber wheel stopper