• Supplied in matched and numbered pairs, each having two
  truly centred 90° vees of different capacities which are
  identical with the vees of its matching block.
• Model 230 comes with one malleable iron clamp with a steel
  screw. Squareness and parallelism within 0.05mm with
  40mm vee capacity.Width 40mm,length 50mm,height 40mm.
• Model 231 comes with a pair of malleable iron clamps with
  steel screws. Squareness and parallelism within 0.008mm
  with 25mm vee capacity. Width 32mm, length 42mm,
  height 32mm.