Platform necessary for use with Foam Inserts (Part Nos. 503-0278-00, 503-0279-00, 503-0280-00, 503-0277-00) or Elastic Bands (Part No. 568-0001-00), For Use With SI-0236, SI-0246, SI-0256, SI-0266, SI-0276, SI-A536, SI-A546 SI-T236, SI-T246, SI-A236, SI-A246, SI-P236, SI-P246, Manufacturers Warranty Length 30 days