Conical Plug For M3 to M4 Screws, Ød1.6 to ØD4.7, 16mm Long, Silicone (White), Pack of 10, HBAS47-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.