Based on this product's specifications, here are some alternatives and similar models
Lapp SKINDICHT KU-M M25/M20 Cable Gland Reducer, Glass Fiber Reinforced Polypropylene, Grey
Summary description:
The Lapp SKINDICHT KU-M is a high-quality cable gland reducer designed for M25 to M20 thread transitions. Manufactured from durable glass fiber reinforced polypropylene, this grey component ensures reliable mechanical stability in industrial cable management systems. Each pack contains 100 pieces, providing an efficient solution for professional electrical installations requiring secure and robust thread adaptation.