The specific material used for the rear brake caliper pad in a Pulsar 220F may vary depending on the manufacturing specifications and the specific brake pad manufacturer. The friction material used in brake pads typically consists of a combination of organic, metallic, or ceramic compounds.
To determine the exact material used in the rear brake caliper pad of your Pulsar 220F, it is recommended to refer to the owner's manual or contact the manufacturer, Bajaj Auto Ltd., or an authorized service center. They will be able to provide you with the most accurate and up-to-date information regarding the composition of the brake pad and the friction coefficient.