Gravity garage door opener rails are C Channel with the following parameters:
![Sectional Belt drive](https://gravitycanada.com/wp-content/uploads/2017/05/Sectional-Belt-drive-300x195.jpg)
Sectional/ Belt Rail
- Available: one-piece rail, two-piece rail, three-piece rail
- 1.2mm thick steel guide rail
- Belt drive
- 7', 8', 10' C channel rail
![Sectional Chain drive rail](https://gravitycanada.com/wp-content/uploads/2017/06/Sectional-Chain-drive-rail-300x187.jpg)
Single Piece/ Chain Rail
- Available: one-piece rail, two-piece rail, three-piece rail
- 1.2mm thick steel guide rail
- Chain drive
- 7', 8', 10' C channel rail