Description Overview 6 inch sterling extruder 32:1 vented Water cooled Year new 1990 Specifications 32/1 l/d ratio 6 zone liquid cooled barrel (vented but is plugged) 500 hp dc motor Stand alone heat control panel with watlow temperature indicators Included Comes with 3 different screws Has 2 screws and one mixer tip Condition Was running pe with 20% glass filler