EZDIVE Finger Spool with Marine Grade Stainless Steel Double Ended Snap 6 Colors Raised logo let cave divers read the spool by touching during a 0 visibility cave diving Spool : corrosion resistant and light weight ABS, 3.15 inch (8cm) diameter Snap :marine grade stainless steel, length 3.54 inch (9 cm) , with 18-8 S/S internal springs 100 Feet high-viz line: 0.073 inch (1.86 mm) #24 Nylon 16-strand braided Line Line length: 100 feet. This quality reel is great for cave and wreck diving