This is a direct replacement for the NW Clear belt.

Models, Late 270, 275, 280, and 290.

I strongly recommend upgrading to the V-Drive, Performance Upgrade Kit 1, http://severalgardens.com/product/performance-upgrade-kit-1/. But if you want a quick fix, buy this belt.

Installation instructions,
Place in boiling water for 5 seconds and hook over the small pulley and roll on to the large pulley by turning the pulley clockwise  (CW) or counter-clockwise (CCW)