The 60mm Underfloor Heating UFH Pipe Clip Staples are designed to fit 16mm pipe works with 14-20mm. Made of black plastic, these staples are part of the Hot Water Underfloor Heating System by the brand warmer system. With a voltage of Not Electric and an Energy Efficiency Rating of A, these clip staples are suitable for heating systems using a boiler. The manufacturer warranty of 2 years ensures quality and reliability in maintaining a comfortable temperature in your home. Ideal for covering an area of 11 - 20 sq m, these underfloor heating accessories are a practical and efficient choice for efficient heating.