31.5*13mm Qinglong Half Length Foam DartsFeatures: This Qinglong foam darts are the high end half lengh foam bullets molded by EPP material. The weight distrubution is designed in golden raio. The Qinglong darts have a higher range, velocity and usage times than other half length nerf darts Very good bullet spread which is proven by test. Specifications: Material: epp Type: half length Diameter: 12. 8 13mm Length: 31. 5mm Weight: 0. 9 1. 0g per piece Package includes: 50pcs or 100pcs darts