S1 76mm Round Tennis Posts. Manufactured from 76mm x 3.2mm steel. Polyester powder coated green. Heavy duty brass winder and aluminium pulley wheel. 4 steel net retaining hooks per post. 322mm deep sockets with 79mm inside diameter and fitted with stabilising base plates. Sockets are complete with flush fitting hinged lids. Sockets have a punched hole, allowing uprights to sit 170mm from the base.