Sold each. Wonder why you cannot bleed the brakes after master cylinder replacement? The feed line grommets are brittle. Always look at these pesky parts when replacing the master cylinder or when bleeding the brakes.
Brand-new factory ate master cylinder, not rebuilt and fit 911, 912, and 914 models. Good braking performance is the most important factor when driving, so don't let a leaking or weak master cylinder leave you vulnerable.