Rectangular interlocking rubber gym tile - same premium build as the square tiles (UV-coated black SBR roll top over an SBR base, base-lock connection), finished with 15% blue EPDM surface granules, 40 mm thick for heavy free-weight and lifting-platform zones. Part of the Black / Blue 40 mm system: colour- and height-matched to the blue ramp edge (PG-RP-BB-40) and corner ramp (PG-CR-BB-40), joined by frosty base connectors (PG-PC-FR-01).