Aluminum anodized gold 7/8” (22.2 mm) seat post. The top 2” of the seat post are knurled. 17” long. Fits old hutches, Supergoose’s mongoose’s, JMC, Patterson pk ripper, TORKER, GT, Haro, redlines torkers thrusters Diamond Backs SCHWINN and the 99% of all old school Bmx bikes. 100% refundable if you are unhappy with this seat post.