20x Replacement Propellers for Cheerson CX-10, Helix S1102, Estes Proto X Nano Quadcopters Fits: cheerson cx-10, helix s1102 quadcopters. 10x white, 10x black. 10x clockwise (cw), 10x counter clockwise (ccw) props. Easy to replace: simply pull old prop off with fingers or pliers, and push the new one on with your fingers. Props made from durable quality flexible injected molded plastic.