Length:6.7cm Width：1.2cm Height:0.7cm weight：0.25kg Material：Plastic color:yellow Description Material: Plastic，Length：67mm Good for grass and thin brush：not for young trees or other hard materials. For best use, avoid using this attachment for edging, working with bricks, chains or Suitable for：RYOBI RAC155 RAC157 Trimmer ABOUT REPLACEMENT BLADES：Made of PA6 (Nylon), put the blades in water at night before using, they will last longer. Quantity: 50 Replacement Blades for RAC158, perfect replacement blades for the original blades. Due to manual measurement, please allow a measurement deviation of 1-3 cm. Due to different displays and lighting effects, the actual color of the item may be slightly different from the color shown on the picture. Thank you!