... adjustable base 3)Material:steel tube,advanced leather sit up bench 1)High quality sit-up bench 2)Height-adjustable base 3)Material ... :steel tube,advanced leather, sponge seat cushion,padded rolls High ... WIth spring exercise,strong sturdy frame7) Material: steel tube,advanced leather,sponge seat cushion,padded rolls8)Carton Size:110*35*16CM9 ...