Builders Edge SMR68TW Sturdimount Receptacle Review

The product is NOT fiber. It has a PVC nail flange and the box itself looks or could be Azek. To make matters worse the product has sharp internal corners but the parts I received are 3/16 radius in all 4 corners (thought this is probably the best option as it is less prone to cracking from weather cycles) . 4 staples on the back attaching the nailing flange to the box BUT there should actually be 8 staples, one on each corner and another halfway between the corners. The description also states