8" "S" Curved Rail Kit with 4 Argon Fixtures. Dimension: 8" Length. Lamp: (4) 50W MR16 GU10 (included). Rail Finishes: Silver (S). Line Voltage. No transformer to worry about. Easily dimmed. Kit can accommodate any fixtures, pendants and/or additional rails up to 2400 watts. Fixtures, standoffs, and power stemcanopy are moveable and can be placed anywhere on the rail. cULus listed. Rail Kit includes:. (1) 4" Pre-Bent Rail (Inside Bars). (1) 4" Pre-Bent Rail (Outside Bars). (1) 3" Power Stem. (1) Canopy for Power Stem. (2) 3" Standoff Support. (4) Argon Fixtures.