50 * 50mm HDPE Opaque Back Catalog number: 8644H-50 Manufacturer: Sampling Systems Availability: In the manufacturer's stock Price on request - + Recommended A516-120 Sieving Tool Price on request 8644AL-50 Coupon 50 * 50mm Aluminium coupon. 240grit (buff Price on request 8700B-19 200mm Sieve.25micron Price on request