The National Precision Swing-Gate 4 flat shader comes assembled with a stainless steel cut-away 4 flat shader tube and your choice of 6 or 8 wrap 3/8" core coils. The Precision Swing-Gate is precision milled our of a solid block of steel to National's own specifications (not cast). Like our other swing-gate machines it was designed for easy changing of tubes and needle bars. Approximate weight, without tube: 8 wrap=9 oz. 6 wrap=8 oz.