Coil Spring 'Small' Bio-Threads® 27G 50mm/210mm (Box of 20)Coil Spring Bio Threads are composed of tightly wound spring of Polydioxanone (PDO) in one cannula. This design allows for a dense amount of PDO to be inserted via one insertion point, and add volume and structure to areas of the face. Common areas treated with Small Coil Spring Threads include cheeks, marionette lines and nasolabial folds. Gauge: 27G Cannula Length: 50mm Thread Length: 210mm 20 Threads per box ALWAYS READ THE INSTRUCTIONS FOR USE.