Stainless Steel worm drive hose clips. Jubilee brand with 10mm or 13mm band widths for up to 2" outer diameter pipe - 200psi maximum working pressure up to 30mm diameter and 100 psi above - see Help and Instructions for recommended torque levels (between 3.4 and 5.9 Nm) 7mm A/F screw. Tridon brand with a narrower 8mm band width and smaller screw size (6mm) for where space is an issue - they can fit into places that wider band Jubilee clips can't.
— part of Vintage and Classic Spares