... quality products and attentive service for our customers". We are looking forward to establishing relationships with you in the ... 6) Bit size:8 1/2"IADC code:5372,products details 3,Packingor steel box4,we can provide more size ... 381(15”),393.7(15 1/2”),406.4(16”)444.5(17 1/2”),508(20”),558(22”),609.6(24 ... 622,632,7326,Payment termsT/T and L/C are acceptable.(30% advanced payment after sign the contranct ...