The STANDARD non-skid profile is the first one that was commercialized. After several years and thousand of meters sold, this profile represents the best compromise between grip, aesthetic and cost. It is the most recommended non-skid profile for outsides because of its higher height and consequently its better efficacy when snowing or freezing.
Test DIN 51130 polished granite tile with a 10 cm class R11 (As reported by CTE-Spain Technical Building Code)
Test Wet Dynamic Coefficient of Friction (DCOF) in order Standard ANSI A137.1-2012, Section 9.6.1 BOT-3000E (according USA)