We are a leading manufacturer of insulation sleeving, main products have: Silicone fiberglass sleeving PVC fiberglass sleeving Acrylic fiberglass sleeving HTG fiberglass sleeving Silicone rubber fiberglass sleeving Diameter: 1----30mm Breakdown voltage: 1.5KV, 2.5KV, 4KV, 7KVWelcome inquiry.