FOAM ROLLER 12" x4"x 40mm Sold as 4 Pieces Ader rubber foam roller (foam pad) for exercise equipment. Bench's leg curl, leg extension, pec dec (butterfly) replacement parts. Size: 12"x4" OD x 40mm ID Sold as 2 pairs (4 pieces) Save 5% each on foam roller offered by fitness-outlet when you purchase 3 or more sets.