To fit 29mm inner diameter hole. Rated at 0.9kg. Cap inner diameter ~41mm. Cap outer diameter ~45mm.
1.1 (16 PSI). Fits 29mm inner diameter radiator hole. Rated at 0.9kg. Cap inner diameter: 41mm. Cap outer diameter: 45mm. Suits: Honda, Kawa...
1.8 (26 PSI). Rated at 1.8kg. Cap outer diameter: 45mm. Suits: Honda, Kawasaki, Suzuki, Yamaha. Made in Japan to OEM specification.