There are so many fins available in the market, varying in stiffness and length.
Every brand has at least a five or six different models available.
And I am not including those older models of each brand. Another thing to take note before getting long fins is the purpose and reason for getting it. It looks quite silly if you are using long fins for twin tank, cos you'd be totally clumsy. Not that you're not already, with added weight and bulk of the additional tank. All rights reserved.