InfiDeals &ndash; ADJUSTABLE & COMBINABLE up to 45 LBS, Patented Twin-Tubes X-Safe Resistance Band Set + 1 Door Anchor & 1 Carrying Bag Safest, most durable, highest material quality resistance band on the market 3-Band LEVEL-combine up to 45 LBS, heavy-duties handles, door anchor & carrying bag. Free ($50 value) exercise guide on website Ship by Priority Mail to everywhere in US including PO Box, APO, AFO and regular address 30- Day satisfaction+60-day free replacement and limited lifetime GR 2 of 3-opening heavy-duty handles that allows you to hook up to 3 bands at the same time to get resistance from 5 - 45 lbs per side.