Adjustable-Table-Clamp-Pulley-Rapid-PH10328-p-A-nylon-pulley-mounted-on-a-sturdy-clamp-suitable-for-attaching-to-tables-&-benches-up-to-4-5cm-thick-The-pulley-is-4-5cm-in-diameter-&-can-be-adjusted-from-flush-with-the-tabletop-to-13cm-above-it-In-addition-the-pulley-can-be-rotated-through-360-deg-to-suit-any-experimental-setup-p-Rapid-Pulley-with-Adjustable-Table-Clamp-Pulley-Diameter-45mm