Based on this product's specifications, here are some alternatives and similar models
Pro Car twin socket coupling Zwillingskupplung max. 16 A for 12 V / 24 V (MPN 67652010)
Summary description:
Twin socket coupling (Zwillingskupplung) by Pro Car, model 67652010, rated for a maximum current of 16 A and compatible with 12 V and 24 V electrical systems. Designed to join two socket lines or provide dual output in automotive and trailer electrical installations. Suitable for vehicle power distribution, towing setups and accessory connections where a compact, reliable twin coupling is required.