GD Series Submersible Grinder Pump With high quality cast iron housing for the long term using. To achieve the excellent performance, we use great VCT cable with Epoxy resin base, dry motor and dura-mechanical seals. This series also with heavy-duty ball bearing and protector and insulation level is IP 68. The design of centrifugal semi-open impeller which can avoid any long fiber items or other objects to block the inlet. Both radial cutter and ring are made from SUS-440C material in which the hardness is reached HRc 55-60 . Any high tenacity objects such as leather, textile, plastic bags, and rope are easily to be grinded.