No Walking Self-Leveling Self-Aligning Roller Head -

  Sumner, Mathey B&B and Javelin. (Please indicate your jack stand type in the notes).

This roller head drops right on top of a standard V-Head jack stand. 

It converts it to a silky-smooth roller head and includes 3 holes for different size pipe.  Far less likely to walk allowing the pipe welder to be more efficient and safer in the field.