They feature drastically reduced mounting depths on woofer baskets and zero tweeter protrusion* for absolutely no physical interference with factory grilles, providing drivers that fit factory locations in numerous vehicles. They use polypropylene cones with tough, ribbed, UVtreated surrounds for precise linear excursion and reliability. Lightweight, 13mm PEIdome tweeters offer superb clarity and volume, helping each CSSeries Coaxial pair provide substantially high power handling and superior sound over factory drivers. Please note that bulky deliveries over 5kg and in a few areas where it is not possible to redirect to the post office, the parcel may be held at the local courier depot instead. Where possible, our warehouse will try and use recycled cartons for our deliveries, just as safe and sturdy as a new carton but more friendly to the environment. Opened and Used items are subject to approval depending on the condition of the unit and packaging. Any product returned with damage to the product, packaging, or removal of any bar code or manufacturer's label will be rejected and returned at the customer's cost. Return requests for commercial quantities must be approved casebycase and may be subject to additional conditions. Goods should be received at the warehouse within 2 weeks from the Approved return authorisation unless previously arranged.