Conical Plug For M8 Screws, Ød4.7 to ØD8.7, 25mm Long, Silicone (Tea), Pack of 10, HBAS87-2-P
SGD $7.00
Conical plugs can be used for a range of hole diameters. Choose one with the right top and bottom diameters to fit the hole size. Simply leave enough length clearance for easy installation and removal.