Based on this product's specifications, here are some alternatives and similar models
Adapter testo 0554 3113 for refrigerant hoses — 1/4" to 5/16" SAE and 7/16" to 1/2" UNF
Summary description:
Mechanical adapter testo 0554 3113 for refrigerant and service hoses, providing fittings conversion between 1/4" and 5/16" SAE and between 7/16" and 1/2" UNF. Designed for use with HVAC/R charging and diagnostic equipment, it allows secure connection of hoses and gauges with differing thread standards for refrigerant handling and measurement tasks.