The Metalab Double Jointed 17 MM Oval Link Pelham with Curb Chain is a stainless steel pelham with a 17 mm double jointed mouthpiece with an oval link. Metalab steel is manufactured on a base of 18 chrome high quality stainless steel and this by using the "Lost Wax" procedure. This procedure assures a perfect workmanship compared to the sand mold procedures where small mistakes can occur.