100% Mylar inside Strong Metallic Structure using 16 mm steel tubes Includes Intraction and Extraction Socks for all possible configurations Available in 5 sizes : HS 40: 40 x 40 x 120 cmHS 60: 60 x 60 x 140 cmHS 80: 80 x 80 x 160 cmHS 100: 100 x 100 x 200 cmHS 120: 120 x 120 x 200 cm