Part includes 2x foam sleeves for the Bootmount 3 bike rack. These sleeves fit snugly around the prongs of the Bootmount 3 to help cushion the bikes during transit.
To install the foam sleeves, coat the inside of the sleeve and the prong with soapy water (dishwashing detergent and water) and gently work the sleeve onto the prong. If you are fortunate enough to have an air compressor, you can inflate the foam sleeve while you slide it along the prong.