1. Material: drop-forged 40CR-V or 45# CARBON STEEL

2. Production technology: heat treated, chrome-plated

3. Size: 35mm,36mm,37mm,38mm,39mm,40mm,41mm,42mm,43mm,44mm,45mm,

46mm,47mm,48mm,49mm,50mm; 1-3/8",1-1/2",1-5/8",1-3/4",1-7/8",2".

4. Package: according to customers requirement.

5. Quality conform to ANSI and DIN3113 standard.