Antistatic NF EN 20284. The Belt Jet belts are antistatic in accordance with ISO 284, NF EN 20284 and DIN EN 20284. Durable. The Belt Jet belts which are abrasion resistant remain supple and elastic throughout use and have a significantly increased life cycle. Thicker rubber cover on the pulley face. Stif Low temperature resisting up to -20°C. Possible temperature range : from -20°C to +110°C. Flame retardant belts are also low temperature resisting up to -20°C.