Comparison : Item # 821-32, Standard Nut Compression to Pipe Angle Needle Seat
Item # 821-42, Standard Nut Compression to Pipe Angle Needle Seat
Item # 821-44, Standard Nut Compression to Pipe Angle Needle Seat
Item # 821-52, Standard Nut Compression to Pipe Angle Needle Seat
Item # 821-54, Standard Nut Compression to Pipe Angle Needle Seat