Masterpiece posts weigh approx 40 grams less than the same size Elite model post, this weight reduction was accomplished while maintaining the strength and durability expected from a Thomson Seatpost. Weight reduction was made possible by machining the seatpost all over including the oval inner diameter. Long 1.614 inch 41 mm seat rail grip length, this helps prevent seat rail bending from impact loads. Very low profile clamps no seat interference swivel nuts are down between the seat rails. Very lightweight approximately 150 grams 250 length for road bikes and 190 grams 330 length for mountain bikes. Every component of the Thomson seatpost is 100 percent American made.