20mm or 0.75in ID Mounting Blocks S8019P02S8019P02 Size: 20mm / 0.75″ Compatible With: Air Bushings, Metric S302001 – 20mm I.D. Compatible With: Air Bushings, English S301901 – 0.75″ I.D. Specifications Engineering Drawings Units: US METRIC Title Specifications SKU S8019P02S8019P02 Attachments: S8019P02.pdfS8019P02.step