- 100% AQUARIUM SAFE Kiln fired ceramic, no curing needed
- 7/8" crown with 3/8" base plug, for most coral frags (SPS, LPS, Zoas)
- SOLID MATERIAL will not create ceramic grit like other products
- HEAVY WEIGHT, each plug weights 8.5 grams (1/4oz), provide solid / stable base for coral
- NEW SURFACE DESIGN, rough surface texture with center hole improve coral attachment