1.material:natural latex(ROHS) 2.any size(perimeter,width ,thickness), colour and logo is available 3.shape: loop 1.resistance band, latex resistance loop , stretch band , yoga strap2.material: both latex and rubber are available3.logo, colours, manner of package and other specifications could be customed4.thickness: 2mm,1mm,0.6mm,0.45mm5.perimeter: 46cm , 40cm,60 or 90cm6.max width :15cm or 75cm ...