The groupies - 3 pack of stackables. Take me home tonight. The groupies are our most loyal rings. The bullet stackable, the racer stackable and the quicksilver stackable make up this power trio. Stack them together to form an ensemble or simply wear them individually as a solo act. Handmade out of 100% carbon fiber in Salt Lake City, UT, our pure carbon fiber rings are incredibly durable, super light, hypoallergenic, and chemical-resistant. Build time and shipping information:  Carbon fiber rings are made within 2 business days of order! Free standard domestic shipping on all rings! Location rate based international shipping! (international customers are required to pay any associated import taxes.)