Prepacked screens consist of a standard, slotted PVC well screen pope surrounded by a stainless steel mesh. Sand is packed between the slotted PVC and the stainless steel mesh. Since the sand is packed around the slotted PVC before the well screen is installed, using prepacks guarantees that sand will be located directly around the well screen. This makes well installation quicker and more efficient than traditional methods. Di-Corp offers a 3″ x 2″ x 5′ x .010″ PVC Pipe Field-Pack Screen.