Q: How about quality assurance & after-sales service? A: We are committed to providing customers with high-quality products and excellent services. If you have any questions about product specifications and usage methods, you can contact us; if you have not received the package, the products damaged due to the logistics, or you are not satisfied with the product itself, please contact us, we will give you satisfied reply and solution within 24 hours. Looking forward to your purchase and experience of our product Specification: Condition: 100% Brand New Item Type: Resistance Band Material: Polyester Cotton + Latex Silk Color: Lake Blue (small resistance), Pink (medium resistance), Purple (large resistance) Size: SizeCircumferenceWidthLake Blue S64cm / 25.2in8.2cm / 3.2inPink M74cm / 29.1in8.2cm / 3.2inPurple L84cm / 33.1in8.2cm / 3.2in Package List: 3 x Resistance Band Note: 1. Please allow 0-2 cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.