TrueSight II Digital Variable ADF Welding Helmet, Arc Angel, SH5 to SH8, SH9 to SH13, 3.25 in x 4 in ORS NASCO oily or rusty steel The high oily or rusty steel The high silicon content increases the fluidity of the weld pool Ideal for environmental applications They are comprised of the best available basic meltblown polypropylene ENV™ Oil Sorbents are packed in distinctive green bags and are the obvious choice when you need low cost plus high performance Economy grind and torch modes Includes four independent sensors positioned to reduce possibility of blockage during weld Sensitivity and delay adjustments for different tasks and durations Operates on two Best in Class optical clarity