Adult Bike MTB BMX XC FR Necessities - Ergonomic Design Shock Resistance Durable TPR Rubber Anodized Aluminum Ends Plug Handlebar Grips Fit 3/4" to 1" Handlebar Fit 3/4" To 1" Handlebar. Ergonomic shaping optimizes comfort and absorbs shock Material: Durable TPR rubber & Billet Aluminum. Size(approx.): L 5 1/16" x W 1 7/8" (13cm x 4.8cm) Special design, reducing the vibration in the riding process.