A-160974ASTrans Disc: 13", organic, spring loaded, (flat flywheel)
A-72160745Trans Disc: 14", 6-button, spring loaded
A-MSR556Trans Disc: 9.25", organic, solid
A-BS556Trans Disc: 9", organic, solid
A-72165066Trans. Disc; 10.875", Organic, Spring Loaded