Check the listing for details. For EA-RTHQUAKE 19923 HEIGHT GUIDE ASSEMBLY METRIC.. Condition: New. Listed at 23.50 USD. Description: Compatibility:This height guide assembly is designed to be compatible with Seis-mic Viper and Ard-isam models PRECISION ADJUSTMENT:Allows for precise height adjustment, clear markings and user-friendly design make adjusting the height a breeze to ensure the best performance of your equipment OUR PLEDGE TO YOU: 30-Day Money Back Satisfaction Guarantee! Fit and Function Guarantee！ Fast & Free Shipping! (Except Alaska & Hawaii) Buy with confidence！ Have questions? Send us a message with your model number and spec number and we would be happy to confirm compatibility! Many replacement parts should be installed only by a professional. If you are not qualified to install this item, you are more than welcome to email us, and we will help with return process.