Features copper shells machined from solid bar stock (not tubing). Thick shell flange. Extra heavy-duty shell end where the tip takes the most abuse. Larger diameter decreases preheat time and maintains the cut on painted or rusty plates. Course "V" splines which cuts better, resists clogs and makes cleaning easier. Medium-duty tips fit "Forney" 1680, 1702, 1705, 1707 and 1753 torch kits and "Victor" compatible equipment.