Rumble Roller / Rumble Roller Middle Size / Standard Foam This is an authentic product purchased directly from Hoshino Trainer's website. (Retail price: 12,100 yen) I bought this for myself, but I haven't used it at all and have kept it stored in its box. I opened the outer box, so I couldn't return it, and I'm listing it on Mercari. I opened it and touched it, so it's as good as new. Exercise Rumble Roller Training Muscle release Hogupira (likely a combination of "ほぐし" (muscle release) and "pilates")