Spare Round Plug-In Base – 3 Pin – Stainless Steel – BlackThis Perko Plug-In Base is for Perko 1211 and 1421 Series Bi-Color Pole Lights. The locking collar is included to allow interchangeability with discontinued style bases.Features:Polished stainless steelBlack polymerWaterproof snap-on coverPigtail leads3 pin versionSpecifications:Base Dimensions: 2-1/4″ O.D.Pole Rake: 0-degreesScrew Size: #8Finish: Stainless steel/black