Description: 1pc plastic diving compact finger spool reel with 15m high visibility line + 1pc solid brass whistle Durable whistle is loud sound, with round ring attached, can be hanging to where you want The spool attached with a stainless steel double end bolt snap clip, strong, reliable and Stainless steel swivel connector is to prevent line tangling and twisting Great gear equipment for scuba cave diving, technical diving, snorkeling; the whistle also suitable for hunting, fishing, camping, hiking, exploring and other outdoor sports activities Specification: Whistle Material: Brass Color: Gold Overall Length: Approx. 5.8 cm /2.3 inch Whistle Length: Approx. 4.2 cm /1.7 inch Ring Inner Diameter: Approx. 1.2 cm /0.47 inch Scuba Diving Spool Material: Aluminum Alloy + Stainless Steel Reel Outer Diameter: Approx. 6.5 cm / 2.6 inch Reel Thickness: Approx. 3.5 cm /1.4 inch Center Hole Diameter: Approx. 2.5 cm /1 inch Line Length: Approx. 15 m / 49ft Line Thickness: Approx. 0.2 cm / 0.08 inch Bolt Snap Length: Approx. 9cm / 3.54 inch Package Includes: 1 Piece Rescue Whistle 1 Piece Scuba Diving Spool with Double Ended Bolt Snap Note: Due to the differences between different monitors, the picture may not reflect the actual color. There is 2-3% difference according to manual measurement, please check the size carefully before you buy the item. Thanks!