Features: Made from durable Terra climbing rope, Croakies has taken their classic Terra Cords and added the Plug n' Play Re-attachable End technology of the ARC System to create the Terra System; comes with one pair of Terra XL ends, which fit 6-9 mm temples, and one pair of Terra XXL ends, which will fit 9-15 mm temples 12" long (each side) x 3.2 mm (diam.); colorfast and washable