Store +3 MrCool DIYCOUPLER-3/8 + DIYCOUPLER-5/8 (Two Sets) w/ 75 ft of Communication Wire DIYCOUPLER-3858K75 $196.00 In stock Quantity: 1 Add to Bag Product Details This DIY Coupler Set Fits 3/8" x 5/8" DIY Lineset Kits for 24000 and 36000 BTU DIY Mini Split Systems. Includes 75 Feet of Communications Wire Save this product for later Favorite