You are looking at a high quality VITON o ring kit suitable for the "T" piece between carbs 1&2 and the fuel rail / tube pieces between 2-3 and 3-4.  Known to fit all 1979-83 HONDA DOHC CB750, 900, 1000 and 1100 with Keihin carburettors.

A total of 6 high quality O-Rings are supplied for direct replacement. These O rings are modern "Viton" compound- resistant to fuel and ethanol, specially manufactured to the original Honda OEM sizes.

It's recommended to replace these seals if you're doing any work at all on the carbs of these bikes- disturbing the old hardened seals will create fuel leaks and the original seals were not ethanol resistant to modern petrols. 

These seals are not commonly found in traditional 'carb kits' often found on eBay so good to have in stock!

Maybe suitable for other models too but please check before ordering.

Fast & Free postage to all UK Mainland addresses.