Pipe Fit: Before purchasing, it's crucial to verify that the water pipe leak repair clamps are compatible with the dimensions of your water pipe to prevent mismatching. If the outer diameter of your pipe measures 20mm, then this repair clamp with an inner diameter ranging from 19mm to 21mm (equivalent to 0.73 to 0.76 inches) would be an ideal choice Quick Fix: The pipe repair kit consists of two separate halves, eight pairs of bolts and nuts. Just place the repair clamp over the pipe crack, join and tighten the bolts. This ensures even pressure distribution, making the installation simple and quick Wide Use: Pipe repair clamp for sudden pipe bursts or cracks. Provides fast water leak control without requiring complete pipe replacement. Pipe repairer is suitable for cast iron pipe, cement pipe, PVC pipe, PE pipe, etc, Weight: 0.24691773344 pounds, Manufacturer: NONDK