Braided and untreated this natural cord material is made, as the name suggests, from a grass that grows in the sea. It has a brittle and crunchy texture and is very pretty. It is an enjoyable chew for most parrots.
You can purchase Seagrass cord in 1 metre increments. It will be cut to the total length ordered.
Thickness varies but averages out at 3/16" or 4mm.