SEL

[Rockrichardson]

I'm a little confused what is SEL . length, width , thickness i understand but not sure what SEL means

 

[mfisher]

SEL = segment edge length.
is the lengh of the outside diamter edge you need to make the disired diameter ring.

cicumference of a ring (circle) divided by number of segments = SEL
circumference of a ring = diameter x 3.14159

 

[DaveJ]

I'm a little confused what is SEL . length, width , thickness i understand but not sure what SEL means

It's the Individual length of each segment at the outside edge.