Conical Plug For M3 to M5 Screws, Ød1.2 to ØD5, 28mm Long, Silicone (Green), Pack of 10, HBAS50-P
SGD $4.00
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.