BCQLI 100 Pcs Plastic Screws, M4&times;16mm(6#) PC Transparent Acrylic Plastic Cross Hand Tighten the Set Screws Model: M416mm(Metric M4= American 6#, diameter 0.138in. 16mm refers to the length of the teeth) PRODUCT SPECIFICATIONS: Round Cross Head PACKING: 100PCS / bag,100 Bolt+100 Bolt heads PRODUCT FEATURES: Good Insulation, No Rust, Corrosion Resistance, Light Weight, Beautiful Appearance PRODUCT USE: Medical Equipment Industry, Wind Power Industry, Aerospace Industry, Office Equipment Industry, Petrochemical Industry ......