These were purchased in bulk by a sports club this August, and I'm selling the extras. I have four more available, so please contact me if you need any. Brand new, unused! Comes with an official training manual. For pelvic muscle training. Tightens the loosened pelvis in daily life. Size: Approximately 20.5cm long x 4.5cm wide x 4cm high Weight: Approximately 70g/piece Material: PU Color: Orange Please understand that this is personally managed. Thank you.