Based on this product's specifications, here are some alternatives and similar models
Tube Alphacool 18511
Summary description:
The Alphacool 18511 tube is designed for optimal fluid flow in computer cooling systems. Made from high-quality materials, it ensures durability and resistance to temperature changes. Its transparent design allows for easy monitoring of coolant levels. Compatible with various Alphacool components, this tube is essential for building or upgrading your cooling setup.