We are professional of producer of drill pipe. We can produceE75, G105grade drill pipe with ISO90001 certificate. And we also can supply used tricone bits both TCI bits and steel tooth bits the size 60mm 76mm 93mm 8.5''--17.5''. If you are interested in our product. Pls feel free to contact us. We ensure to provide you with best quality product, best price and service.