Description Are you looking for a professional, yet affordable seat post? Are you in search of a sturdy, trustworthy tool that can do multiple jobs at once? If yes, look no further! Our professional seat post, made of aluminium alloy, must meet you needs. It is one of the best choices for you. Features -Color: Black -Material: aluminium alloy -Size 31.6mm: About 40x3.16x3.16cm/15.75x1.24x1.24inch -Size 30.9mm: About 40x3.09x3.09cm/15.75x1.22x1.22inch - Made of premium aluminium alloy material for durable and practical use. - Easy and convenient to install and remove. - A nice helper for your bicycle, bring convenienve to you. - Suitable for mountain bikes, road bikes and more. - Adjustable and waterproof, very convenient to use. Dear customers, thank you for your support of the brand! Please note: brand products are only sold in this store. If you purchase branded products from other stores, will not be held responsible for any problems (including but not limited to quality problems, after-sales service, etc.). In order to protect your rights, please make sure to purchase from stores to avoid not being able to enjoy genuine product guarantees and brand services due to choosing other unofficial channels. Thank you for your understanding and support! 1 x seat post Made of premium aluminium alloy material for durable and practical use Easy and convenient to install and remove A nice helper for your bicycle, bring convenienve to you