The clusters have six brass inserts with female UNC 6-32 threads to attach up to four soft markers (included). Each cluster is held in place on the body with a Fabrifoam SuperWrap strap (included). Replacement straps may be ordered separately.
Sold as a set of two clusters, including four markers and one strap per cluster.
Replacement markers: soft markers – 15mm neoprene base. https://www.qualisys.com/accessories/markers/soft-marker/
Weight1: 29 g
Dimensions: 131 × 80 mm (5.16″ × 3.15″)