NC SF 45 head like F-I is between 27-31' plus 10'
tip, so it is in the same range as most of 3D heads by Rio
or GL. For example if your use Rio
580 gr H-I-S3 it is 40' and in case of larger fly you add 36' strong tippet, as it would be the case when using NC 45 F-I + 10' S3. With NC 45 you can also use 15' tip in 80-110 gr depending on F-I head size.