NET brand Rectangular Muffle Furnace : Maximum Temp. 950ºC working temp. 900ºC. is a high-quality product and trusted all across the globe. Rectangular Muffle Furnace : Maximum Temp. 950ºC working temp. 900ºC. is being manufactured and supplied by the company reputed because of excellent product quality, friendly service and professional approach. Scroll down to see specifications and reviews.