Straight rules are calibrated in inches and metric

Filter: Integrated AF300 Filter

Aluminum luer-lock hub provides very secure fit

Beveled eyes provide optimal drainage without weakening the tip

It provides superior weight distribution and air circulation for reclining support

Cloth Pouch Cover, Mid Size 20 Closed System Straight rules are calibrated inNu Comfort Cloth Pouch Cover 6 1 2" x 11 1 2" Opaque, Large Opening, 20 oz, Medium, Cotton and Polyester, Pre Shrunk, Machine Washable Cushion pouch in a well fitted cotton poly cover that gently buffers body from perspiration, chafing and allergy. The wide open bottom offers easy access to drainage. The pre cut circular opening can be enlarged simply by cutting up to the outer blue lined stitching. These new covers are tender but tough. Easy to