Oversized Square tube introduces the easy design, Pully: nylon with sealed bearing, PU foam with synthatic,Tube size-50*100mm, Weight stack-80kg,Made of fiber.With Powder coated Specification Oversized Square tube introduces the easy design, Pully: nylon with sealed bearing, PU foam with synthatic,Tube size-50*100mm, Weight stack-80kg,Made of fiber.With Powder coated