... ";4" The size of Nail: 6*6*75mm, 6*6*100mm Steel Nail Clip, Pipe Clip with Nail, Pipe Fitting Material:Hot ... 4",2";2.1/2";3";4"The size of Nail: 6*6*75mm, 6*6*100mmFuntion: to fix ... heatNon-toxic:no heavy metal additivies,would not covered with dirt or contaminated by bacteriumLower installation costs:light weight ... in low pressure loss and high volume Steel Nail Clip, Pipe Clip with Nail, Pipe Fitting