Pre-flared ends with nuts are for simple and easy installation. Copper aluminum coil line set fits most ductless mini split air conditioners. Our mini split line is protected with triple-layer insulated cotton, consisting of embossed polyethylene film, weather- foam, and thickened insulating cotton. The ends of the copper pipes are flared perfectly ,and the flare fittings are leak-free. This line set for ac is outfitted with anti-cracking thickened nuts and protective caps. Warm Tip:The black attaching nuts is not inclded in the pakage,you need to buy in other store. Color:White Material:plastic Package Contents: 1 x Insulated Coil for Air Conditioner Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.