Based on this product's specifications, here are some alternatives and similar models
NICOLL 1V01S Water Flush Mechanism
Summary description:
The NICOLL 1V01S water flush mechanism is a reliable replacement component designed for toilet cisterns. This flushing system ensures efficient water discharge and consistent performance. Engineered for durability and ease of installation, it is compatible with specific NICOLL toilet models, providing a functional solution for maintaining or repairing bathroom sanitary equipment.