Enhance your underwater safety with our durable Diving Cylinder Knocker Ball, crafted from high-quality silicone and PA66 materials for lightweight strength and long-lasting use. Designed specifically for underwater signaling, this practical diving accessory generates a loud, clear sound to effectively alert your diving partner or others in special situations. Key Features: · Premium Silicone and PA66 Construction: Ensures the knocker ball is lightweight, durable, and resistant to underwater wear for extended use. · Easy to Use Underwater: Simply attach the knocker ball to your diving cylinder and pull the elastic strap to produce a loud knocking sound, improving communication in underwater environments. · High Elasticity Strap: The flexible, stretchable strap adjusts to fit most diving cylinders of various sizes securely and comfortably. · Loud and Effective Sound: Produces a sound much louder than traditional diving signaling devices, helping you to be heard clearly in emergency or low-visibility situations. · Portable and Lightweight: Weighing approximately 37g (1.3oz), it is easy to carry and adds minimal weight to your gear. Specifications: · Material: Silicone + PA66 · Item Type: Diving Cylinder Knocker Ball · Application: Underwater Signal, Outdoor Sports · Weight: Approx. 37g / 1.3oz Package Includes: · 1 x Diving Cylinder Knocker Ball This Diving Cylinder Knocker Ball is an essential underwater safety tool, combining a lightweight design with high elasticity and superior sound output to help you stay connected and secure during your dives.