1. The guide wheel is made of high‑speed steel material, durable and long service life 2. The wheel has brass plating surface processing, not easy to rust and corrosion resistant 3. Simple to use, the range and tightness can be adjusted according to the size of the welding clamp head 4. The height adjustment range is 22-45mm which can be used with PT31 oxygen cutting gun 5. With great workmanship, perfect replacement for the old or damaged oneItem Type: Cutting Roller Guide Wheel Material: High speed steel Height Adjustment Range: Approx. 22 ~ 45mm / 0.9 ~ 1.8in Inner Diameter Adjustment Range: Approx. 18 ~ 23mm / 0.7 ~ 0.9in