Designed for 3.5 aluminum driveshafts with .125 wall tubing and 1350 series U-joints, Sonnax T35-28-3512 aluminum weld yokes are forged from 6061-T6 aluminum and precision-machined. From street car to street rod, drag strip to dirt oval track, Sonnax aluminum weld yokes can help take your vehicle to the next level of performance. High-strength forged, aluminum yokes are stronger than OE yokes and offer significant weight savings over steel components Critical dimensions and tolerances are tightly controlled to ensure every part is perfectly concentric, minimizing time in building and balancing Specs: U-Joint Series: 1350 U-Joint Used: 1350 Material: 6061-T6 Aluminum Tube Dia.: 3.50 CL to Weld: 1.75 Tube Wall Thickness: 0.125 Weight: 0.830lbs