5 Pack Replacement O-Ring Drive Belts, Buna Nitrile Rubber Bands Compatible with National Geographic & Dr Cool Rock Tumbler Polishing Machine

Replacement Drive Belts Compatible with National Geographic & Dr Cool Rock Tumblers Keep your rock polishing projects running smoothly with this value pack of spare drive belts. Our O-ring rubber belts are specially designed as aftermarket replacement parts, perfectly matching the original drive belts installed on National Geographic and Dr Cool rock tumblers. Made of high-quality Buna-N nitrile rubber, each belt boasts great wear resistance and lasting elasticity, preventing easy breakage during continuous tumbling work. These belts strictly follow original equipment dimension standards to guarantee stable power delivery between motor and polishing barrel, offering consistent rotating speed for even stone grinding and polishing. This package includes 5 black O-ring drive belts, enough spare supplies for long-term hobby use. When your original belt stretches, slips or cracks, you can directly swap it out with our replacement belt in minutes without complicated tools. Important Note This item is an independent aftermarket replacement accessory. National Geographic and Dr Cool belong to their respective brand owners. Our belts are not officially produced, endorsed or affiliated with these two brands, only designed for compatible use.

• 1. Accurate Standard Size for Perfect Fit These O-ring drive belts come with an outer diameter of 3.03 inches. With standardized dimensions, they can seamlessly replace the original drive belts and match National Geographic & Dr Cool rock tumblers precisely.
• 2. 5-PACK SPARE BELTS FOR LONG USE Comes with 5 identical rubber drive belts per set. Sufficient spare parts help you avoid interruptions to your rock polishing hobby when the original belt wears out, cutting down equipment downtime effectively.
• 3. DURABLE BUNA-NITRILE RUBBER MATERIAL Crafted from premium Buna-N synthetic nitrile rubber, these drive belts feature outstanding abrasion resistance and stable flexibility, maintaining steady performance during long-term tumbler operation.
• 4. STABLE POWER TRANSMISSION Manufactured to match OEM size standards, these O-ring belts smoothly transfer power from the motor to the tumbler barrel, delivering consistent rotation for uniform rock polishing results every time.
• 5. EASY MAINTENANCE ACCESSORY Simple DIY replacement for worn, cracked or loose drive belts. Replacing old belts is quick and effortless to restore normal running performance of your rock tumbler equipment.