Based on this product's specifications, here are some alternatives and similar models
SpiroFlex SpiroFlex 75 duct connector (PP) with gasket KR75-PP
Summary description:
SpiroFlex 75 duct connector made of polypropylene (PP) with integrated gasket, model KR75-PP. Designed to join circular ventilation or HVAC ducts with a nominal diameter of 75 mm, the connector provides a sealed mechanical joint to reduce air leakage. Suitable for residential and light-commercial ventilation installations where a PP, gasketed coupling is required.