Sublime, lightweight, billet aluminum, CNC machined beauty. STM products are imported from Italy where speed and beauty mix to produce perfection in products designed for racing and aesthetics. The aesthetics of speed, you might say. Perfect craftsmanship, engineering and balance. Functional and pleasing. Very well machined STM Oil fill plugs. Detailed construction. CNC Aluminum. Pre-drilled for safety wire. Application Guide Aprilia M20x1.5 Ducati ALL M22 except 696, 848, 1098, etc. Honda CBR600/900/1000 M20x2.5 Kawasaki ZX6/9/10/Z750/z1000 M30 Suzuki SV650/SV1000 GSXR600/750/1000 M20x1.5 Yamaha YZFR1/R6/FZ6 M27 Sublime, lightweight, billet aluminum, CNC machined beauty. STM products are imported from Italy where speed and beauty mix to produce perfection in products designed for racing and aesthetics. The aesthetics of speed, you might say. Perfect craftsmanship, engineering and balance. Functional and pleasing.