Description Overview Sliver Drawing And Doubling Frames Unit A: Sliver drawing, doubling frame Mackie, year 1996, 24, 4 out / 4 heads. Unit B: Sliver drawing, drawing frame Mackie, year 1996, 24, 4 out / 4 heads. Unit C: Sliver drawing, drawing frame Mackie, year 1996, 24, 8 out / 4 heads. Unit D: Sliver drawing, drawing frame Mackie, year 1996, 32, 16 out / 4 heads. Unit E: Sliver drawing, drawing frame Mackie, year 1996, 48, 24 out / 6 heads. Ring Spinning Frames Unit F: Ring spinning frame Mackie, year 1999, 528 spindles, Mack V. Unit G: Ring spinning frame Mackie, year 1999, 528 spindles, Mack V.