The BPG Suppressor CVR HVY is designed to be 0.5" longer than the Suppressor itself. This allows the CVR to cinch around the front and rear of the Suppressor to ensure a No-Slip Fit. The HVY CVR is made from aerospace and military grade fire retardant materials. DuPont Kevlar has a maximum operating temperature of 1000 degree F (roughly 180 shots fired of m855). The second component of the Suppressor CVR HVY is an inner liner comprised of fiberglass mesh sleeving with a maximum operating temperature is 2000 degree F.Features :Black"6.5"x 1.5""Full Auto Capable up to 1000 Degrees