metal coil tubing, seamless mechanical metal tubing, seamless coupling stock, namely, non-machine couplings for metal pipe and tubing, welded metal line pipe

seamless coupling stock, namely, machine couplings for metal pipe and tubing; oilfield equipment, namely, pulsation dampeners and parts therefor, wellhead equipment, namely, casing heads and spools, tubing heads and spools

oilfield equipment, namely, pressure control equipment in the nature of blow-out preventers and parts therefor