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

2. Production technology: raised panel, heat treated, chrome-plated

3.Size:33mm,34mm,35mm,36mm,37mm,38mm,39mm,40mm,41mm,42mm,43mm,44mm,

45mm,46mm,47mm,48mm,49mm,50mm,54mm,55mm,57mm,60mm,65mm

1-15/16",1-3/8",1-7/16",1-1/2",1-5/8",1-11/16",1-3/4",1-13/16",1-7/8",1-15/16",2",

2-1/16",2-1/8”,2-3/16”,2-1/4",2-5/16",2-3/8",2-7/16",2-1/2".

4. package: according to customer’s requirement.

5. Quality conform to ANSI and DIN3113 standard