Seal Plus is offered in single- and double-cartridge configurations, both with an Aflas O-ring pusher design. The single seal (SP1) has a carbon or silicon-carbide rotating face with a silicon-carbide stationary face and 316 stainless steel metal parts. A carbon restricting bushing is supplied with a cast 316 stainless steel flush, vent and drain glands. The double seal (SP2) also uses a carbon or silicon-carbide inboard rotating face and 316 stainless steel metal parts. It has a silicon carbide stationary face with a carbon vs. silicon carbide outboard face combination and a cast 316 stainless steel gland with an inlet and outlet port.