A. Rust Armur is optional B. Flex Rim C. High Density Pole&Gusset padding GSC454Inground Adjustable Basketball Systems Features:1. 4"x4" Heavy Duty Pole is engineered for you to dunk like a Pro. 2. Rim Height can be adjusted from 7.5’ to 10’. Safety Rod is set at height of 7'4".3. Improved Crank system: Stronger and Smoother than most of cranks in the market. 4. High Density non-absorbent Pole ...