You are purchasing ONE Piece of the Replacement Lamp for 36W UV Bulb Lamp For Tetra Pond GreenFree UV3 36 Watt PL-L TUV Germicidal Ultraviolet (36 Watts) 10,000 Hour Long Life Lamp 12 Month Warranty This Premium Quality Replacement lamp is Manufactured by Starlighting and is Guaranteed to Meet or Exceed the Original Manufacturers Specifications. The use of the Original Manufacturers Name is for Identification purposes only. The name Tetra Pond is trademarked and wholly owned by Tetra Pond . We do not sell or distribute Tetra Pond Products