... Indicator Stud 1. Material: 304/316 Stainless Steel 2. Surface Design: Flat, Skidproof diam Anti-Slip Stainless Steel Tactile Indicator Stud 1. Tactile indicators ... , walkway, ramp, stairs or landing. 3. Materials: 304 or 316 Stainless Steel. 4. Purpose location: Airport, Railway Station, Public Walk Way, Mall, etc ...