Larsen Fractional Cello, 1/2 Set. Keeping all things in proportion: Our aim was to offer Larsen cello for smaller instruments without compromising the Original Larsen sound. Our fractional sets are purpose designed, perfectly proportioned versions of our full size Originals. The same high grade steel cores wound for A and D in stainless steel flat wire, while G and C are based on a concentric multi-stranded steel core wound with high grade tungsten.