Product Performance: The product is made by a special process with a bright color and monochrome,multi-colors. good tensile force,strong resilience . aging resistance,good tensile strength etc. Product Material: 100% pure natural latex imports of processed latex tubes ,EVA foam handles high-level. Product Testing: Product testing by SGS,with non-toxic no side effects,can be used at ease. Model: This product is in accordance with sub-tensile strength: soft,medium,heavy,extra heavy four kinds. www.tubingexerciser.com/ TEL:+86-0755-27185241 +86-0755-27185242 FAX:+86-0755-27185253 Phone:+8618923768373 qy9188@hotmail.com latextubing@hotmail.com skype:szhcty