Sensitive Metal Feet Mf-v3 Spesification : ARMOR BOOT - X'GLIDE MOUSE FEET DURABLE, SENSITIVE,FRICTIONLESS BASIC SPECIFICATIONS Material: Special Metal Material Glides 20% faster Sustain Lens Working Distance Quality Remains after 300km of Abration Test Box Dimension : 8x13x0.5 Cm Weight : 10 Gr