Our luxury line MEM II memory foam chair armrest pads are designed with supporting curves for each arm. The cushioning is very soft and the comfort factor is excellent! The black vinyl upholstery looks and feels like leather, soft to the touch but easier to clean. These armrests are 10.5" long, 4" wide, and 2" thick. The bottom attachment screw holes are measured from center to center with many standard options: 1", 1.5", 2.5", 3", 4", 5.5", 7". Attachment screws are included. Product material description: heavy duty plywood core with industry standard 1/4-20 embedded screw threads, thick high density memory foam, soft touch black vinyl upholstery. Pricing is per complete pair (right and left) of chair arm pads. This product is not offered as single pads. Specify a quantity of 1 for 1 set.. 2 for 2 sets.. etc.