Specification Brand : Generic BulletPoint1 : The extension pole for trimble R10 R12 includes a height measurement lever with a defined measurement point BulletPoint2 : R10 / R12 height extension (0.15m/ 0.492 FT) w/ 5/8"-11 female & male Thread BulletPoint3 : Base Station Height Adapter for Trimble R10 R12 R12i GNSS Receivers BulletPoint4 : The base station extension pole increase the height of the receiver to allow clearance for the 450 MHz internal radio antenna and also allows for easy and accurate measurement of the base station antenna height. BulletPoint5 : Durable construction: built to last, this level is durable and resistant to wear and tear, ensuring longterm reliability,engineering scale ruler,measuring ruler tool Color : Black IncludedComponents : Torpedo Level ItemDisplayWeight : 0.18 pounds ItemName : 2 Pack Base Station Extension Pole Height Adapter for Trimble R10, R12, R12i, SPS985, SPS986, R780 GPS GNSS Receivers Antenna with Standard 5/8 x 11 Thread ItemPackageDimensions_Height : 0.79 inches ItemPackageDimensions_Length : 10.63 inches ItemPackageDimensions_Width : 2.95 inches ItemPackageQuantity : 1 ItemTypeKeyword : levels Manufacturer : ACCRSNCH Material1 : Aluminum Material2 : Plastic ModelName : 89846-00 ModelNumber : 89846-00 PartNumber : 93O220WO8090769O PowerSourceType : hand_powered ProductDescription : 89846-00 RTK Base Station Extension for Trimble R10 Compatibility: Designed for Trimble R10, R12, R12i, SPS985, SPS986, R780 GNSS receivers. Function: Simplifies base station setup and height measurements for GPS receivers or antennas with 5/8 x 11 industry-standard threads. Height & Threads: Features a 0.15m (0.492FT) height extension. The top has an external 5/8"×11 thread, and the bottom has an internal 5/8"×11 thread. Unique Design: Comes with a height measurement lever and rod, providing a defined measurement point. This not only simplifies setup but also enables accurate base station antenna height measurement. Material: Constructed from high-quality aluminum alloy. Purpose: Increases receiver height, allowing clearance for the 450 MHz internal radio antenna.