Sit-up Bench(fitness,sports,fitness machine) Function:sit-up exercise Spec.1.76*3mm thick tubing design,firm and durable Sit-up Bench(fitness,sports,fitness ... machine)Function:sit-up exerciseSpeciality:1.76*3mm thick tubing design ... choice for the professional gym Welcome to WNQ! Sit-up Bench(fitness,sports,fitness machine)