uxcell 3pcs 1/2PT Thread Pig Automatic Nipple Stainless Steel Waterer Drinker Product Name : Pig Nipple Drinker;Overall Size : 63 x 20mm/2.5" x 0.8" (L*Max.D) Male Thread Dia. : 20mm/1/2PT;Inner Hole Dia. : 6mm/15/64" Material : Stainless Steel;Color : Silver Tone Weight : 236g Package Content : 3 x Pig Nipple Drinker