Used Trek Bicycle Company three tube carbon fiber bicycle frame. Made in USA. I think it was made in the late 1980's. 3 main tubes are carbon fiber and the other tubes are aluminum. The dropouts are stainless steel so I think this is a model 2500. Also, I think it is a 2500 because it had Dura Ace parts. 60 cm from the center of the bottom bracket to the top of the seat tube. It has the rear brake routed through the top tube. I have left a new brake cable casing in the frame. You can use it or use it as a guide to put a new cable through the frame. The English threaded bottom bracket looks good. It has studs on the down tube for down tube shifters or cable stops for bar end shifters or combination brake/shift levers. There is a fitting for a braze-on style front derailleur. There is a set of water bottle cage fittings on the down tube. No fork is included, I used it to convert a short bike to the Threadless aheadset system. I don't see any major flaws, just the typical scuffs and scrapes of a used frame. Important, Please read!To ensure safe transit I use recycled bubble wrap, styrofoam, or packing peanuts. No charge to box it up or to carry it to the shipper. Safe and undamaged arrival of your purchased item is a top priority. Any insurance cost is the responsibility of the buyer. Please note that the "USPS Ground Advantage" option is very popular but the shipping times are sometimes long, especially if you are in Alaska or Hawaii. Overall, I have had a good experience with USPS Ground Advantage except for Alaska and Hawaii. The shipping times to those two states are much longer than what is published. Priority Mail prices include up to $50.00 insurance at no additional charge. If you do not want the shipper to leave the box without your signature, please send me a message at auction close so that I can include that option. Signature confirmation is an additional charge. The International Shipping shown here is by First Class Mail. First Class Mail does not include insurance. Priority Mail is also available but is considerably more expensive. If you would like Priority Mail Shipping, please select "Ask Seller A Question" and include your full address. I will check on the shipping costs. Buyer assumes all risk if shipped uninsured. If bidding/buying multiple items, and the items don’t include free shipping, please wait to pay for any items until you receive an invoice from me. I will combine items into 1 box and send an invoice to you for all items to save you money on shipping charges. I often ship the same day or next day but sometimes need up to 2 business days. Payment by Paypal only. Winning bidder agrees to pay within 24 hours of the auction closing. Bid with confidence, I've been selling on ebay since 1999 and have 100% positive feedback. Thanks for L00king!!