Similar to the official Maple Leaf nub but slightly wider at the sides, coming in at 4.5mm. Height is identical. Being wider at the base gives the nub a little bit more downward force onto the BB from each side, helping slightly to center it.
Made from silicone, this pack includes 2 different degrees of hardness; 60 (green) or 70 (black)
Length: 4mm
Width: 4.5mm
Height: 3.5mm