YKS 5030 Plastic Propeller for Mini 250 Quadcopter Multi-rotor (Pack of 10 Pairs) Material: PC plastic. Props made from durable quality flexible injected molded plastic. Value Pack: Comes with 10 sets of props (10 CW Props & 10 CCW Props). Favorable price and multiple colors allow you to change it as you like. Works with mini QAV250 quadcopter multi-rotor (1804/1806). Higher tension and very easy to install.