Ping G5i Putters. High-tech polyurethane materials are used to produce the advanced dual durometer insert in the face of the new Ping G5i range. The combination of the soft back insert and firm impact surface provides optimal sound and feel for ultimate performance. Ping G5i putters are approximately 10% more forgiving than previous models. Alignment is improved with a ball-width, crescent-shaped top rail and a new Optigraphic Alignment System installed in the back of each model.