fanmountiwthlinersleeveflange

for use with FAN: https://www.amazon.com/dp/B00KF7QO2G?ref=ppx_yo2ov_dt_b_fed_asin_title
Exhaust vent: https://www.amazon.com/dp/B08L97K8Z5?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_6&th=1
to silicone over a circular 4in exhaust vent for my Sprinter van

Print out of TPU