ITEM NAME:Bike Bicycle Spare Parts Metal Chain Tensioner 5 Pcs N3F1 Bike Bicycle Spare Parts Metal Chain Tensioner 5 Pcs N3F1 Product Name : Bike Chain Tensioner;Material : Metal Color : Silver Tone;Thread Dia : 5.8mm/0.22" Overall Size(Each) : 4.7 x 2cm/1.85" x 0.78"(L*W) Weight : 59g Made from metal material in silver tone, long-lasting, practical and reliable. Adjusts rear wheel for centering in frame, an ideal spare parts for bikes. Package Content : 5 x Bike Chain Tensioner Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..Color : Silver Tone;Thread Dia : 5.8mm/0.22".