Based on this product's specifications, here are some alternatives and similar models
Replacement saw chain EINHELL 4500176 for BG‑PC 4040, weight 300 g, package 90×155 mm
Summary description:
Replacement saw chain EINHELL 4500176 designed for compatibility with Einhell BG‑PC 4040. The chain weighs 300 g and is supplied in a package sized 90 × 155 mm. Intended as a direct replacement part for maintenance and restoring cutting performance of the compatible petrol-powered saw, it provides a quick fit option for routine chain replacement and workshop repairs.