API 8C Travlling Block Spare Parts Hook Blocks for Oilfield Traveling Block In accordance with API Spec.8C and marked with API MONOGRAM; Joining the Traveling Block and Hook together to reduce overall length. The grooves are quenched to extent the service life. Equipped with the rope covers. There is a reliable safety device. Model Parameters YG60 YG90 YG110 YG135 YG170 YG225 YG350 YG450 Max. Hook Load KN(USton) 600 900 1100 1350(150) 1700(190) 2250(250) 3170(350) 4500(500)