A/B. INDOOR/OUTDOOR COVERS- These waterproof, vinyl outdoor air conditioner covers stop drafts and moisture. Prevent rust. Ties neatly in place. Clear vinyl indoor cover keeps cold out. Has snug-fit elastic edge. Order both. One size fits all. C. FREESTANDING SQUARE AND ROUND COVER- Waterproof, square or round cover for freestanding, outdoor air conditioning unit. Prevents rust. Comes with sturdy elastic strap to keep it securely in place. The freestanding square cover is 34"W x 30"H and the freestanding round cover is 34"D x 30"H.