5 PCS EFIELD MH-260 1/2-Inch Straight Male Sweat Copper Water Hammer Arrestor $35.99 Brand EFIELD Type Adapter Shape Straight Number in Pack 5 Item Diameter 0.5-1.0 in Material Brass Features Corrosion Resistant Finish Brushed Brass UPC 016975049463 condition New 5 PCSStraight Copper water hammer arrestor1/2-Inch male sweat connectionCompatible with press fitting systems like Viega ProPress, push-fit systems like SharkBite, Efield etc.AA size..