The Kryptonite 454 Drip Tip, is a revolutionary durable drip tip. The outer housing of the drip tip is made of delrin to allow a cooler to the touch feel. The inside of the drip tip is stainless steel. And on the bottom the holes are on the side to diffuse the vapor and help cool it. As with everything by Krytonite, this is proudly made in the USA.