Ader Foam Roller High Density (FR-6x4x1) Sold By Pair Ader rubber foam roller (foam pad) for exercise equipment. Bench's leg curl, leg extension, pec dec (butterfly) replacement parts. Size: 6"x4" OD x 23mm ID Sold as a pair (2 pieces) Save 5% each on foam roller offered by fitness-outlet when you purchase 3 or more sets.