ConProTec Inc. (Salem, N.H.) has developed the S-50 System 10:1 ratio cartridges for its MIXPAC handheld cartridge dispensing system. The system consists of a manual dispensing gun, a cartridge and a static mixer. Each cartridge has a 50-ml capacity. Cartridges are available in either polypropylene or polyester construction and are designed to ensure precise ratio control, reduce material waste and increase overall cost savings with improved manageability and productivity, the company reports.