Phelps Metal External EZ Bugle Tube Elk Call - Manufactured as a one-piece aluminum bugle tube, the Phelps METAL balances the elk hunters' demand for a weight-conscious, compact design and the ability to project loud, crisp calls. The aluminum construction provides more sound than plastic and is engineered to meet the frequency of bull elk. The bugle has been sandblasted, anodized black, and wrapped in a closed-cell neoprene sleeve to eliminate glare and unwanted noise.