A deluxe high threshold with heavy extruded aluminum design and replaceable vinyl insert. Vinyl caulking feet seal bottom of threshold. Heavy duty premium high boyAluminumA deluxe high boy thresholdExtruded aluminum thresholdReplaceable vinyl insertSteel retainer holds inserts securely so they can't be kicked outVinyl caulk feet seal bottom of threshold3-3/4" width1-1/8" height36" length