Root Riot^™ Plant Starter Cubes are consumer friendly and come packaged ready-to-use in two convenient sizes! Each kit includes a black plastic propagation tray without holes, a 50 cube plastic insert and 50 ready-to-plant Root Riot^™ Plant Starter Cubes. Each tray of cubes also includes a complimentary 15 ml packet of Clonex Rooting Compound Gel, which is the perfect amount to stick 50 cuttings.