Store +3 MrCool DIYCOUPLER-1/4 + DIYCOUPLER-1/2 w/ 50 ft of Communication Wire DIYCOUPLER-1412K50 $105.00 Out of stock Quantity: 1 Add to Bag Product Details This DIY Coupler fits the 1/4" x 1/2" Lineset attachment for 9K, 12K, and 18K Indoor Air Handlers Save this product for later Favorite