Use these heavy-duty, 304-alloy, 11-ga. stainless steel Slip-In Legs when the flue tile does not extend high enough above the crown to secure your Hy-C Caps. They easily and quickly convert your Hy-C Caps from corner screw-in mounting to a snug inside flue grip. Simply bolt the Legs to the corners of your Hy-C Cap and slip them into the flue. Installation may not be totally secure in extremely high winds.