Based on this product's specifications, here are some alternatives and similar models
Endoscope probe Voltcraft FLX LF 25 — waterproof borescope 25 m length, 28 mm diameter
Summary description:
Voltcraft FLX LF 25 is an endoscope probe designed for visual inspection in hard-to-reach places. It features a 25 m cable and a 28 mm probe diameter, and is waterproof for use in damp environments. Suitable for plumbing, HVAC, automotive inspection and industrial maintenance, it allows remote visual checks and troubleshooting where direct access is limited.