Introducing the RTS (Rack Trolley System) ●Weight capacity: 350lbs for pulley exercises, 500lbs for squats and bench press ●Material: The body is made of steel with a thickness of 6mm; The rollers, which are made of UHMW. ●Shipping: Free shipping to most countries within 15-20 days. (Please message us to confirm if there is a shipping cost to your country.) ●100% Fit Guarantee: Please send your measurements via email, along with accompanying photos. We will double-check to ensure that it fits your rack perfectly. ●Warranty: lifetime for the body, 1 year for the parts. *The RTS should not be dropped as it may cause damage to rollers and other hardware, resulting in voided warranty.