The 20mm 90 degree elbow is sized for use with standard 20mm electrical PVC conduit . 20mm conduit is suitable for DIY projects where the conduit length is not longer than 1m. Note:This is not a furniture grade component, but is still suitable for hobby projects - as with all pvc connectors in this store, these items do not have barcode/price stickers on them, and therefore make them easier to prepare for painting if required for your project