Quick view Add to Cart Restek Ultra Silica, 5um, 10x4.0mm Guard Cartridge, 3-pk. SKU: 910050210 Now: $213.00 Was: Was: Catalog # Product Name Particle Size Size Units 917450212 Ultra C18 Guard Cartridge 5 μm 10 x 2.1 mm 3-pk. 917450210 Ultra C18 Guard Cartridge 5 μm 10 x 4.0 mm 3-pk. 910350212 Ultra C8 Guard Cartridge 5... SKU: 910050210 Weight: 0.05 LBS Add to Cart Now: $213.00 Was: Was: Add to Cart Compare Quick view Qty in Cart: 0 Quantity: Decrease Quantity of undefined Increase Quantity of undefined Price: Now: $213.00 Was: Was: Subtotal: Add to Cart