Gamma Tour Elite Squash String comes in 17 gauge and 18 gauge. Gamma, a leader in the tennis string market has now launched 3 new squash strings for 2011. The Tour Elite is a premium multifilament string featuring Gamma’s Livewire technology. This string offers great durability, power, and feel. This is a string that challenges the very popular Tecnifibre 305 string. Color: Black.