The 148 Series Press-Pak Heavy-Duty V-Packing comes in a variety of configurations, each with a reinforcing female adapter, an energizing male adapter and 1-4 heavy duty intermediate seals. The sets are composed of elastomer and reinforced with fabric with high preload. Offered endless or split. The 148 Elite Series includes abrasion-resistant polyurethane seal rings, along with a robust, extrusion-resistant Polyamide female adaptor ring.