Celt, Alloy, Quick release bike clamp.  This is high quality material.  Very strong and sturdy.  Easy to install on you bike.  The clamp is well made and it is a easy quick release.  You will really be pleased with this product.  They have another size and alot of colors to choose from.  If you need one of these this is the one.    Thank you for allowing me to try your product  I recommend this product. Disclosure: I received this product at a discount in exchange for my honest review.

http://www.amazon.com/bike-seatpost-clamp-MTB-seat-clamp-34.9-mm/dp/B017TPUHHO

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