Reporting question for Tension Spring - Bigsby, Vibrato, 1" long

Product:
Tension Spring - Bigsby, Vibrato, 1" long

Question:
What spring for a Harmony h78? thin electric like 335.

Answer:
We would need to have the model of bigsby that is installed on the guitar. We cannot recommend a bigsby spring based on the model of the guitar it has been installed on. Also, it has a lot to do with how high you like your handle.