Retail price: 12,870 yen For full-size instruments. Used for one week, then stored in a paper bag inside an instrument case for one month. No rust. No fraying or rosin buildup. These gut strings have power. They have a more powerful sound than the gut strings Olive, Gold, and Eudoxa. While the characteristic gut sound is less pronounced than those three, they still produce a sweeter tone compared to nylon or steel strings. These gut strings are similar to nylon strings, so they are especially recommended for those who are new to gut strings or who want power from their gut strings. Once they stretch and stabilize, they are handled similarly to nylon strings in terms of tuning and humidity. Would anyone like to try them? - Brand: PIRASTRO PASSIONE