The Luxilon Alu Power 1.25 mm monofilament string is the most popular on the pro circuit thanks to its top power and control.
Yonex Poly Tour Pro 125 Tennis String Set
Yonex PolyTour Rev 125 Tennis String Set
Matrix Power Micron X Monofilament 100m - 0.11mm - 3.0lb 100m
Matrix Soft Steel Ultra Power Monofilament Line 100m - 0.18mm
Monofilament Avid Extremity Hi-Vis Xr Mono 0.30 13Lbs 5.4Kgs
Monofilament Shimano Aero Slick Silk Rig 100 m