1/8" (01/DN4) external thread is about 9mm 1/4" (02/DN8) external thread about 12 mm 3/8" (03/DN10) external thread about 16 mm 1/2" (04/DN15) external thread about 20 mm 3/4" (06/DN20) external thread is about 25 mm 1" (1 inch/DN25) external thread is about 32mm If you have any questions or problems after purchase, please feel free to contact us, we will give you a satisfactory answer as soon as possible. ProductSiteLaunchDate : 2021-10-29T01:11:32.401Z Size : 6 UnitCount : 1 UnspscCode : 40141700