[Public-list] Spreader replacement

[Alexei Kassatkin]

Hello,

I'm a new Alberg 30 owner beginning a refit of "Blue Heron"  #455.   
Can anyone provide me with the tube dimensions for the original 
spreaders.  MIne appear to be original - 1.75", or 44mm round aluminum 
tubing, which is badly corroded at both the tips and at the connection 
point to the mast - in definite need of replacement.  I'd appreciate 
any recommendations on which type of aluminum  (6061, 6060 or 6063) 
would be appropriate and  how to isolate the spreaders from the ss 
mount on the mast.   I've enjoyed reading this forum, and thank  you 
for any input you may have.