Listing is for a PAIR (2) Black or White (your choice) Size is 1-15/16" OD, 1-9/16" ID, 9/16" inner depth, 13/16" overall height. Check your mallet to see if they will fit. You may need to do some trimming and attachment with glue for use. These are custom 3D Printed Flexible Polyurethane Plastic parts.