Travelling block--Main features:                                                    Specification (Click here)

(1)The sheave groove is quenching treated, anti-abrasion with long service life.
(2)Built to API 8A, having the certificate of authority to use the official API monogram.
(3)Conforming to the requirements of industry standard SY/T5527.
(4)The sheave and bearing are interchangeable for those of mated crown block.