The CE ROHS Model 721 Visible Spectrophotometer offers user an economic way to UV testing without sucrifizing many advanced features. With the built in memory for up to 200 test, expanded key board and large sample compartment the CE ROHS Model 721 Visible Spectrophotometer is a great additon. Equipped standard with 4 position manual cell holder for 10mm cells. Additional holders are available. Contact your distributor for details.