EShopps Frag Plugs 24 Count made for use with the EShopps Straight Frag Rack and the Corner Frag Rack. Eshopps frag plugs make hard coral propagation a snap. Simply use an aquarium-safe adhesive such as AquaStik: Epoxy Putty HoldFast Epoxy Stick or Gel Super Glue to secure coral fragment onto plug. Insert coral plug into frag rack or live rock to grow your very own coral frag. 24 plugs; 1-3/4 long. Makes a great addition to any coral growing kit to propagate more corals.