Material: ABS. Diameter: 1-1/2 in. Material Type: ABS. Replaces "wafer" caps. Large glue area. Deeper glue surface ensures a good seal especially on unevenly cut pipe. Durable virgin ABS may be glued to pipe with PVC, ABS, or all purpose cement. Easy grip handle - will not blow out. Tip acts as handle while applying glue and can be snipped to allow filling bleeding with water or air for testing.