Enhance your underwater communication with this 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 ensures you can easily alert your diving partner or others with a loud, clear sound. Key Features: · Premium Silicone and PA66 Construction: Combines flexibility and durability, making the knocker ball lightweight and resistant to wear in underwater environments. · Easy to Use Design: Simply attach the knocker ball to your diving cylinder and pull the elastic strap underwater. When released, the ball strikes the tank producing a loud, attention-grabbing sound. · High Elasticity Strap: The adjustable strap fits most diving cylinders securely, providing reliable performance across various tank sizes. · Enhanced Sound Volume: Generates a much louder knocking noise compared to standard diving signaling tools, improving your chances of being heard in special or emergency situations. · Lightweight and Portable: Weighing approximately 37g (1.3oz), it is easy to carry and adds minimal weight to your diving gear. Specifications: · Item Type: Diving Cylinder Knocker Ball · Material: Silicone + PA66 · Application: Underwater Signal, Outdoor Sport · Weight: Approx. 37g / 1.3oz Package Includes: · 1 x Diving Cylinder Knocker Ball This Diving Cylinder Knocker Ball is an essential underwater safety tool, offering reliable and loud signaling capability to improve communication during dives. Its durable materials and versatile fit make it a practical accessory for divers seeking enhanced safety and convenience.