The Zink ATM Green Machine is made from durable polycarbonate and features a double reed type for smooth, effective calling. It includes a specialty insert with a Z-out, no-stick tone channel that ensures consistent performance. With the same calling abilities and design as the original PH-1, it's a great introductory option for those looking to start their duckcalling journey. FeaturesMaterial: PolycarbonateReed type: DoubleSpecialty insert: z-out, no stick ton channelSame calling abilities and design as the original PH-1Great introductory Option