Panacea Products 84170 12" x 18" Green PVC Coated Peony Grow Thru Ring - Quantity 12 Quantity of (12) : Panacea # 84170 12" Diameter x 18" Tall, PVC Coated, Peony / Plant Support Hoops / Grow Thru Rings Provides needed support for emerging perennials , bulbs, plants 3 movable legs fold down for convenient off season storage PVC coated for years of use. For best results, these rings should be used early in the spring as plants emerge from the ground.