EspTiger Wu Jie 480 x 400 x 4mm Retail Pkg:19.25x16x0.6 inch. Weights:1.77 lbs. Polyurethane Foam Base Hexagonal Anti-Slip Pattern Unfelted Thread Knitted Fabric Three Dimensional Weaving Consistant X & Y Axis Precise Control Smooth Glide Lock & Press Edge Denser & Softer Base Fast Compression Rebound Strong Desktop Adhesion |