The bottom of the triangle, the structure is more stable

Color fastness: no fading for 5 eyars

Sample charges: sample is free ,client need to pay for express charges

Delivery time: 3-15 days after order confirmed

Stock: always have for basketball (red and green color)

Life time: at least 8 years ,if maintenance better, will be last more than 10 years.

Maintenance cost: almost none,if damage by solo pcs, dismount and repalce a new one is ok.

Adhesive glue : no need because of self weighted ,could not be rebounce back

Thermal expansion and contraction: Solved