These MasonMate Type TPF Nylon Plugs have the following specifications: Size: 8 x 50mm. Anchor Hole Size: 8mm. Screw Gauge: 10-12G. Screw Size: 4.5-5.5mm. Min Hole Depth: 60mm. Pack Qty.: 100. The MasonMate Type TPF Nylon Plugs made for use in lightweight, aerated and hollow blockwork giving quicker and greater expansion than standard wall plugs. 8 x 50mm (100)