Odor Threshold Test: *Snap & Sniff Date expiration code 2016 Return for refill $495 The Snap & Sniff Threshold Test Kit is comprised of 20 smell wands . Five contain no odor, whereas the others contain half-log dilutions ranging from 10-2 (strongest) to 10-9 (weakest) vol/vol concentrations. Rapid, reliable determination of threshold values. $200 as - is $550 refurbished with new refills. ** Please reference item #221013-13137-13 when contacting us about this listing. Return Policy Items are sold as-is as described and pictured. Most items come with a 7 day option to return and a 30 day limited parts warranty. Feel free to call before you buy. 888-649-6497