This blade space is made of stainless steel and is designed for multi-blade cutting in MTI SYJ150 low speed saw, and also can be used for Southbay or Buehler lowspeed and as saw which has 0.5" diameter airbore Specification: Model EQ-LSSO23 Dimension 62 mm O.D 0.5 mm I.D. Spacer thickness 1/4" ( 6.35 mm )