 
    | Catalog number | Component name | a [mm] | b [mm] | Weight [kg] | 
|---|---|---|---|---|
| R18/B | U-bolt dia. 12 mm for tube | 166 | 215 | 0,45 | 
| R18/C | U-bolt dia. 12 mm for tube | 182 | 230 | 0,49 | 
| R18/D | U-bolt dia. 12 mm for tube | 210 | 254 | 0,55 | 
| R18/E | U-bolt dia. 12 mm for tube | 234 | 280 | 0,61 | 
| R18/F | U-bolt dia. 12 mm for tube | 262 | 305 | 0,66 | 
| R18/G | U-bolt dia. 12 mm for tube | 290 | 334 | 0,73 | 
| R18/H | U-bolt dia. 12 mm for tube | 348 | 385 | 0,85 | 
| R18/I | U-bolt dia. 12 mm for tube | 396 | 435 | 0,96 |