Conical Plug For M16 Screws, Ød11.1 to ØD17.4, 25mm Long, Silicone (Milky White), Pack of 10, HBAS174-P
SGD $16.00
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.