Hester-Dendy Sampler, Round, 14-Plate, Pkg of 10 First Aid Supplies heavy-duty PVC-coated fabrics are recommended

heavy-duty PVC-coated fabrics are recommended for tough wear and tear

Hip Chain Thread

streams and lakes

High-contrast black markings on a white background

stable base

Hester-Dendy Sampler, Round, 14-Plate, Pkg of 10 First Aid Supplies heavy-duty PVC-coated fabrics are recommendedProduct Code: 150 A55 This inexpensive, compact and lightweight device has become a staple in the field and is similar in function to the periphyton. The most adaptable artificial substrate sampler on the market, its EPA recommended in 2 versions. Suspend it, float it or attach it to submerged objects such as boulders or stakes. Leave it in place for 2 or more weeks, then scrape the critters off the plates and analyze in the lab. Constructed of 1 8 (3