colej
Correct Nippon 950GH come in .370 and .355 all discete length. See Golfworks. .355 https://www.golfworks.com/nippon-pro-950gh-355-iron-shafts/p/np0012/ .370 https://www.golfworks.com/nippon-pro-950gh-370-iron-shafts/p/np0011/
What DTG has is something different. I'd guess what pellmell said is more correct. DTG is not going to offer Nippon 950GH's at $12.49/ea when the discrete lengths are going at MSRP $24.50/ea. When it's cheap there is always a reason why. The progression on DTG's .370 tipping chart is .25" on the 4i to 1.75" on wedges to me that says a lot.
Nippon 950GH is also the #1 LPGA steel shaft played over the years. I have used a lot of them over the years.