Telsto Cold Shrink EPDM Tubes equal to cold shrink 8420 and 8430 series A series of open-ended, tubular rubber sleeves, which are factory expanded and assembled onto a removable core. They are supplied for field installation in this pre-stretched condition. The core is removed after the tube has been positioned for installation over an in-line connection, terminal lug, etc., allowing the tube to shrink and form a waterproof seal. The insulating tube is made of EPDM rubber, which contains no chlorides or sulphurs. Features 1. Simple installation 2. No tool or heat required. 3. Seals tight, retains its resiliency and pressure even after years of aging and exposure. 4. Resists moisture. 5. Wide range, size accommodation. 6. Resists acids and alkalies. 7. Resists ozone and ultraviolet light. 8. Resists fluid splashes. 9. Resists fire - will not support flame.