Gibraltar products are known for their solid reliability. They stand the test of time — and life on the road! So when you're looking for rock-solid hardware and dependable accessories and replacement parts for your drum kit, This 4-pack of Gibraltar Cymbal Sleeves is designed for use on pull rods with 6mm threads. The sleeves provide proper positioning for your cymbals, guard against unwanted rattle, and act as a protective barrier against metal-to-metal contact that can damage cymbals.