Specification: Material: POM + Stainless Steel Color: Black, Tan (Optional) Suitable: For Comtac I, Comtac II Headset Connected to All Series FAST, ACH Series, MICH Series Helmet Package Weight: approx. 65g Quantity: 2pcs How to Assemble: Take out the headset cloth cover from the 2 sides of the Comtac headset. Take out the headset line from the headband (need hoop wrapped). Hang the headset adapter on both side of the headset. Assemble to the helmet. Bind the headset line to upper part of the helmet, then use tape to fixed on upper part. Package Includes: 2 x Helmet Rail Adapters (Not including helmets) Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.