Rossa CGB (Center of Gravity Back) putters are engineered with an exceptionally deep centre of gravity (CG) to enhance launch conditions, thereby improving performance. The idea for the Rossa CGB putter line was inspired by the tour-proven Rossa Monza. When Rossa engineers designed the Monza they succeeded in creating a deep and low CG position, facilitated by Monza's large, trapezoidal shape, which permitted the use of heavy tungsten-filled Titallium rods to position weight deep in the head, well away from the face. This deep-back CG positioning dramatically enhanced the Monza's launch conditions, producing a noticeably smoother roll. After the Monza was developed, the next challenge for Rossa engineers quickly became clear: Find a way to duplicate Monza's enhanced launch conditions in a classically shaped putter. Rossa succeeded by developing two key design improvements. The first key CGB putter improvement involves the dramatic expansion of Rossa's Titallium face insert, renowned for its remarkable feel, to 43% larger than previously used. This larger insert offers two significant benefits. One, because Titallium is so much lighter than steel, the larger insert allowed Rossa engineers to reallocate 43 grams normally positioned in the face into the back of the putterhead, moving the CG back. Two, this larger insert delivers improved feel at impact than the previous Rossa Sport model. The second key CGB putter improvement came in the form of tungsten CG rods inserted into the rear side of each putter. These CG rods and CG plugs serve to concentrate weight into strategic areas that helps to shift the CG even farther down and toward the back of the putterhead. Cast of soft 304 stainless steel every model features a milled face for perfect flatness; milled portals into which the CG rods and CG sleeves are inserted, ensuring a perfect fit; and a sleek Tuscan Nickel finish that looks great and reduces glare.