uxcell 12 Pcs Silicone Rubber Tapered Plug, 4.5mm to 8.5mm, Black
Tapered Design: The tapered shape allows for a secure push-in fit into holes and openings of different sizes. Simply push the stopper into the desired opening for an instant, leak-proof seal. Solid Silicone Stoppers: Made of silicone rubber, resistant to cracking, shrinking, hardening, or breaking.