Description: 【Dive Equipment Accessory】: This diving equipment side mount bottle rubber cylinder accessory. It includes cylinder base and two rubber cylinder straps, designed specifically for 12L diving cylinders. 【Easy Installation】: The design of this product makes it easy to install onto your back carry system, providing convenience and efficiency for your diving experience. 【Material】: Made from plastic and rubber materials, this product is built to withstand the rigors of underwater use while maintaining its integrity over time. 【Product Dimensions】: The straps measure 23cmx8cm/9.06inchx3.15inch each, while the base measures 19cmx9cm/7.48inchx3.54inch, making them suitable for most standard sized diving cylinders. 【Package Includes】: Each package comes with 2x straps and 1x base, providing you with everything you need to secure your diving cylinder and effectively. Size Chart: straps: 23cmx8cm/9.06inchx3.15inch base: 19cmx9cm/7.48inchx3.54inch Package Includes: 2 Retainer Band 1 Base Note: Please allow slightly errors 1-2cm differences due to manual measurement.