The Direct Cartridge Holder can be used instead of the regular guard cartridge holder. As it screws directly into the column, no connecting tube is required for connection to analytical column!
Please click the link below to find more information:
https://www.nacalaiusa.com/products/view/267/cosmosil-hplc-accessories
Please click the link below to find more information:
https://www.nacalaiusa.com/products/view/267/cosmosil-hplc-accessories