Ventilation Plug Material Stainless Steel, Aluminium Ventilation Membran Material Acrylic copolymer on nylon-support O-Ring NBR Ingress Protection Rating IP 68, IP 67 Operating Temperature Permanent -40 °C to +100 °C Intermittent -45 °C to +150 °C Thread Type Metric,PG Other thread types also available upon request. Accessories Lock nuts Gasket(Washers) Remarks Some approvals do not cover all sizes. O-ring available all products except D-type M40. All accessories must be ordered separately