For 3″ PVC systems: start with SUPER SHIM SMALL for home wall penetration to exterior, then use the PVC CLEAT to support fan suction side, then use a SLEEK TRANSITION to get back to the siding.  

Colorado-made.   Support two small businesses with this purchase!

**Due to customer feedback, design changes may be implemented at anytime.  Product received may not match photos on website because we’re always improving!!**