The Manta Suppressor Sleeve is designed to fit suppressors that are 1.5 inches in diameter which covers most .223, .300, .308, 5.56 and 7.62 suppressors. Once installed on a suppressor that is 1.5 inches they can be cut to length for a custom fit. The Sleeves will resist the extreme heat generated from suppressors, thus protecting operators from accidental burns while helping to reduce mirage. Sleeves will not melt!