Item Type: Archery Arrow TipMaterial: RubberGross Weight: 45g/1.6ozApplicable to: 8MM/0.31in arrows 1Premium Rubber: Made of rubber material, these arrow heads are durable, wear resistant, and they have long service life. 2Applicable To: The inner diameter of the archery arrow tip is 8mm that is suitable for wood shafts, fiberglass shafts, carbon shafts, bamboo shafts. 3Practical: The rubber safety arrow tip is suitable for archery practice, competition and archery, making the competition fun and ensuring safety. 4Easy to Install: No installation tools are required for the installation of this arrow head, just insert the 8mm arrow slowly. 55 Pieces: Delivery of these archery arrowheads set includes 5 pieces and they are light in weight that are easy to carry for outdoor arrows training.