Steel hex nuts (like T2) in combination with a clamping jaw machined from high-grade aluminum allow for a weight reduction up to 35 g or 30% depending on the respective product. These new hex nuts come with a special, self-locking thread which reliably prevents vibration-induced loosening. Available ERA-TAC Gen 2 30mm Mount with Levers MPN Height Inclination T4013-0023 1.50" 0 MOA T4013-0033 1.89" 0 MOA T4013-2025 1.50" 20 MOA T4013-2035 1.89" 20 MOA Available ERA-TAC Gen 2 30mm Mount with Nuts MPN Height Inclination T5013-0010 0.98" 0 MOA T5013-0015 1.18" 0 MOA T5013-0020 1.38" 0 MOA T5013-0023 1.50" 0 MOA T5013-0033 1.89" 0 MOA T5013-2010 0.91" 20 MOA T5013-2015 1.10" 20 MOA T5013-20221.38" 20 MOA T5013-2025 1.50" 20 MOA T5013-2035 1.89" 20 MOA ERATAC Gen 2 One-Piece Mount 30mm 0 MOA 25mm-.98" High T5013-0010