•Super Sprouter inserts are available in a variety of different colors including yellow blue orange green purple red and black. •The use of different colors allows you to separate plants by species or age. No need for plant markers. •Neoprene material is soft enough to not hurt the stem but strong enough to support large cuttings. •Built in “T” groove slot makes inserting the cutting easy. •Holds moisture without over saturating. •Versatile – the Super Sprouter inserts fit in most cloning machines.