Square interlocking rubber gym tile with concealed base-lock connection. UV-coated black SBR roll top over an SBR base, finished with 15% blue EPDM surface granules, 20 mm thick. Locks via frosty base connectors (PG-PC-FR-01). NOTE: no colour- and height-matched blue 20 mm ramp/corner currently in the range - the blue ramp/corner are 40 mm, and the 20 mm ramp/corner are white.