This is a set of silicone non-slip pads and scratch-prevention felt pads for slatted mats. There is a small, dot-like hole on the back of one of the pads, but I confirmed it immediately after opening, so it seems to be from the manufacturing process. I don't think it will affect use in particular. - Type: Non-slip pads - Quantity: 2 - Material: Silicone - Size: Approximately 4cm in diameter - Adhesive backing included 8 scratch-prevention felt pads for slatted mats - Adhesive backing included