Tough, durable, and lightweight polypropylene clamps. Working temperature range: 60 F. to 340 F. No. PPC 1525: 1 4", 18 per card No. PPC 1538: 3 8", 15 per card No. PPC 1550: 1 2", 12 per card No. PPC 1575: 3 4", 8 per card No. PPC 1600: 1", 4 per card