Inspire Fitness Leg Curl/Extension Home Gym Attachment Leg Extension Requires: Inspire Fitness SCS Bench or Inspire Fitness FT1 Adjustable Bench. Requires: Leg Conversion Kit if purchased for the FT2 Functional Trainer Frame - Heavy-duty steel Pad - Closed cell foam, single stitched high grade naugahyde Warranty - Residential: Limited lifetime. Light Commercial: Limited lifetime frame, 10y parts. Commercial: Limited Lifetime frame, 1y parts Dimensions: 21 in x 20 in x (Max) 32 in (54 cm x 21 cm x 82 cm)