Proportioning Valve Kit Disc/Drum with Bracket & Lines Using The Standard GM Brake Line & size Fitting 

that is 

2 x 3/8 Front Brakes L&R

1 x 9/16 Rear Brakes 

1 x 1/2 Master Front Inlet

1 x 7/16 Master Rear Inlet 

See Photo

Note Does NOT Come With Brass Fittings They Are Sold Separate Under Brake Fitting 3/8 7/16 1/2 9/16

Also Note

All Ford Masters with 60/40 Split The Larger Reservoir 60% Is for The Front Brakes and is To The Rear 

of The Master (Booster Side Rear of Vehicle)

All GM Masters With 50/50 Split Are The Opposite Way Round The Rear of Master (Booster End Rear of Vehicle is Rear Brakes usually 9/16 Port & 1/2 Port Front of Master Goes To Front Brakes Via T or Distribution Block

Depending on the master cylinder, you purchased make sure you get it right