SG16 Stump Grinder Required Hydraulics Standard Flow Cutting Wheel Diameter - With Teeth 21.5 in Cutting Depth - Below Ground 20.5 in View Full Specs SG36 Stump Grinder Required Hydraulics High Flow XPS Cutting Wheel Diameter - With Teeth 21.5 in Cutting Depth - Below Ground 20.5 in View Full Specs