Floor tactile 35mm brass grooved without pin

DionePRO Round floor tactile without mounting pin. Diameter is 35mm. Tactile height is 5mm. The material is 316-grade stainless steel. Surface is smooth and luminous, colour is yellowish green. Main use of tactiles is to aid visually impaired to traverse open premises by indicating primary routes of travel, to provide directional information, and to indicate special hazards such as steps, ramps or escalators.