# Machined from solid aluminum # Hard anodizing provides a durable surface and smooth throttle control # Knurled outer tube for adhesion to grip Works Connection throttle tubes are machined from aircraft grade aluminum. These billet throttle tubes are 100% stronger than stock, and the hard-anodized surface provides a smooth feel. All tubes have a knurled surface for grip adhesion. These are used by race teams world-wide, but made in USA.