Link Seals & Wall Sleeves Link Seals Model “C” Link Seal Model “S-316” Link Seal Model “O” Link Seal Model “T” Link Seal Model “FD/FS” Link Seal Model “OS-316” Link Seal Model “L” Link Seal Model “LS-316” Link Seal Model “S61” Link Seal Wall Sleeves ‘CS’ – Century-Line Sleeve ‘WS’ Intermediate Sleeve ‘WS’ Split Wall Sleeve Steel Wall Sleeves