The Support Rod for Corning® Hot Plates and Stirrers, model 440129 from Corning is a stainless steel, two piece, 18 in. (45.7cm) support rod with a 5/16 in. (0.8 cm) diameter that consists of two 9 in. Fits Corning hot plate and stirrer models PC-400/410/420, PC-400D/410D/420D and PC-600D/610D/620D.