13mm or 0.50in ID Mounting Blocks S8012P02S8012P02 Size: 13mm / 0.50″ Compatible With: Air Bushings, Metric S301301 – 13mm I.D. Compatible With: Air Bushings, English S301201 – 0.50″ I.D. Specifications Engineering Drawings Units: US METRIC Title Specifications SKU S8012P02S8012P02 Attachments: S8012P02.pdfS8012P02.step