Looks like I should have ordered more when I did, it's no longer stocked.
This was from my order of 9/12/2013:
1. Lees Thinwall Rigid Tubing - Clear: : 7/16" OD x 36" Long Sku: S16020
URL: http://www.lnt.com/show_product/507393
SKU: 507393-16020-S16020
Quantity: 1
2. Lees Thinwall Rigid Tubing - Clear: : 1/2" OD x 36" Long Sku: S16025
URL: http://www.lnt.com/show_product/507394
SKU: 507394-16025-S16025
Quantity: 5