This quality reel is great for cave and wreck diving. Spool: corrosion resistant and light weight ABS, 3.15 inch (8cm) diameter. Snap: length 3.54 inch (9 cm), with 18-8 stainless steel internal springs. Cord: 0.073 inch (1.86 mm) #24 Nylon 16-strand braided cord. Cord length: 100 feet