51348: 2.2 teacup. Smaller diameter, 1" shorter than 51068
51335: omni glhs, shortest, half as long as a 51515.
51085: 1/2" shorter than 51068
Then there's.......
51773: diesel, 1 1/2 times as long as 51515, quart and a half capacity.
These are wix numbers, for a Napa number, delete the front five.