The Zinox MegaFrame Atlas sets consist of 1 set for some Atlas Front Awnings and 2 sets for others. These are the frames required for each front awning: 

Awning Atlas G16
--> Frame: Zinox Mega Frame Front Awning ATLAS G14-G18

Awning Atlas G18
--> Frame: Zinox Mega Frame Front Awning ATLAS G14-G18

Awning Atlas G19
--> Frame: Zinox Mega Frame Front sun canopy ATLAS C1 G19-G23
--> Frame: Zinox Mega Frame Front sun canopy ATLAS C2 G19-G21

Awning Atlas G20
--> Frame: Zinox Mega Frame Front sun canopy ATLAS C1 G19-G23
--> Frame: Zinox Mega Frame Front sun canopy ATLAS C2 G19-G21

Awning Atlas G21
--> Frame: Zinox Mega Frame Front sun canopy ATLAS C1 G19-G23
--> Frame: Zinox Mega Frame Front sun canopy ATLAS C2 G19-G21

Awning Atlas G22
--> Frame: Zinox Mega Frame Front sun canopy ATLAS C1 G19-G23
--> Frame: Zinox Mega Frame Front sun canopy ATLAS C2 G22-G23

Awning Atlas G23
--> Frame: Zinox Mega Frame Front sun canopy ATLAS C1 G19-G23
--> Frame: Zinox Mega Frame Front sun canopy ATLAS C2 G22-G23