Based on this product's specifications, here are some alternatives and similar models
Rain Collar SpiroFlex SpiroFlex 100 (protective flashing for duct/pipe penetration)
Summary description:
SpiroFlex 100 rain collar is a protective flashing designed for sealing and weatherproofing pipe or duct penetrations. Manufactured by SpiroFlex and matching the 100 model size, it prevents water ingress around rooftop or wall penetrations, provides a neat finish and helps protect insulation and building fabric. Suitable for HVAC, ventilation and general pipe through-roof applications.