Based on this product's specifications, here are some alternatives and similar models
Roof Flashing / Roof Penetration 100 mm with 0° Collar SpiroFlex SX-OKD100PD
Summary description:
Roof flashing (roof penetration) SpiroFlex model SX-OKD100PD for 100 mm duct or pipe passages. Features a 0° collar (flat) design for sealing roof penetrations and creating a weatherproof connection between pipe/duct and roofing. Used in HVAC, ventilation and exhaust installations to route round ducts through pitched or flat roofs while preventing leaks. Suitable for professional installation with compatible 100 mm systems.