1.An yi amfani da haɗin haɗin ɗalibi don daidaita tsayin daka na cikakke bututu ko igiyoyi, ana amfani da su don daidaita matsayin zurfin kayan aikin ƙasa.
2.Standard: API 5CT
3.Size: 2 3/8 ″, 2 7/8 ″, 3 1/2 ″, 4 1/2 ″ da sauransu
4.Grade: J55 / K55 / N80 / L80 / P110
5. Tsawon Layi: 2FT / 3FT / 4FT / 5FT / 6FT / 8FT / 10FT / 12FT