QPC - Quick Positioning Pipe Clips (Plastic, Bags of 10 clips) A complete range of 8 sizes from 1/4 to 1 3/8. For easy installation to 41mm x 21mm and 41mm x 41mm channel. Positive, easy fixing, twist clip through 90 degrees. Insulates, provides external diameter 9mm width (same as insulation) material withstands temperatures between -30C and +135C. Excellent resistance to oil.