Magnavis® Dry Method Non Fluorescent Magnetic Powder, 10 lb, Pail, Gray ORS NASCO Highly efficient device for grounding Highly efficient device for grounding weldments while being rotated on turning rolls or positioners The 2 in shaft shoulders up to a steel nut which the user welds to his rotating work or fixture A simple tension adjusting bolt provides maximum efficiency or MapPro oxygen Multi flame nozzle for preheating and straightening Fits 300 series torches For MFA 12 and MFA 15 use HD 310C torch with 3 8 hose manifold if acetylene withdrawal rate exceeds 1 7 cylinder content per hour general purpose contrasting indications across a variety of surfaces and backgrounds Designed to produce superior indications of surface and slightly subsurface discontinuities in ferrous materials Use them to identify indications in welds