A pair of BORG tubeless valves for road, CX/gravel or MTB. The base is rectangular and fits all BORG rims well. They do work work with other rims. In the shop I fit them to BORG, Pacenti, Kinlin, DT Swiss, Shimano and other rims.
The collar is colour matched and there is an rubber ring to stop the collar scratching your rim.
The valves all have removable presta cores.
Do them up tight and you will get a good seal. Always tap the valve in place with a rubber mallet to ensure its seated before tightening the collar up. Install the tyre with soapy water and inflate. There should be no leak at the valve. If there is you have a tear in the rim tape or you have not fitted the valve correctly.
This is how you avoid installation woes.
Theses lovely valves are not carded to reduce waste.
40mm, 50mm, 60mm, 70mm and 80mm lengths.
These valves fit rims driiled for 6.5mm to 7.8mm holes. Rims without spoke hole/no tape may require manufacturer specific valves.