New "B" front brake hose for 69-71 CB750K. This is the brake hose that connects your front master cylinder to the 3 way splitter. Here's a tip: rubber brake hoses are known to break down from the inside out, therefore it's not always easy to tell if a hose needs replacing. If it's old, throw it out and replace it! Replaces OEM#45126-300-003. Made in Japan. Check fitment info for all models and year ranges this part fits.