This valve also has a port for a NHRA valve to meet NHRA regulations. The X-Series nitrous bottle is made from high grade aluminum and given a black power coat finish for a long lasting show quality look. This bottle will work with any brand nitrous system and will fit any standard size 10lb or 15lb bottle bracket. This bottle does not come with a bottle nipple. NOTE: This bottle uses a #326 two piece bottle nut/nipple.