Product Size: 15.27.86.8CM Product weight: 98g/piece Specifications: 4 packs Product Performance: The initial spring clamping force is 1.0kg, the final spring force is 4.5kg, and the firing sensitivity is 25-35g. Product Features: Reusable clip to one button, spring loaded design, easy operation, easy placement, good bite force, plastic material. With double spring design, the mechanism is sensitive enough to trigger even the smallest mouse.