Get current pricing for Thelco, 4 Oven Thelco 4 Oven Unit Powers And Heats Quickly. Heated To 101f/38c After 15 Minutes. O.d. 22l X 22w X 28.5t / I.d. 17w X 17d X 27t. Internal Glas . Product Category: Lab Equipment, Sub Category: Ovens: