[PREMIUM NEOPRENE MATERIAL] Crafted from soft and firm Neoprene, these collars a safe environment for your cuttings, being sterile and pH neutral. [ADVANCED 8 SPOKE DESIGN] Featuring an innovative 8 spoke design that minimizes pressure on cuttings, allowing multiple small cuttings to thrive in each collar. [SUITABLE FOR VARIOUS SYSTEMS] Designed to fit net pots, cloning machines, and DIY cloners, making them for effortless production. [PERFECT SIZE FOR CUTTINGS] Each collar measures approximately 48mm in diameter and 18mm in height; please check your size requirements before purchasing.