ITEM NAME:4pcs Counterweight For Boom Cymbal Stand Drum Percussion Inner Dia 12mm Description: Counterweight for Boom Cymbal Stand. Stabilize your boom stands. The counterweight can be added to the back of any cymbal stand to extend boom length while creating the perfect balance for far-reaching setups. Durable and lightweight, easy to use. Material: Metal Size Chart: Inner Diameter: Approx. 12mm/0.47inch Length: Approx. 118mm/4.65inch Package Includes: 1 Piece Counterweight for Boom Cymbal Stand SKU: DMO0012936919465071.Counterweight for Boom Cymbal Stand. 1 Piece Counterweight for Boom Cymbal Stand. Stabilize your boom stands. Durable and lightweight, easy to use.