Universal 50ml Gun (7200, 7125, R95, & 2888) - Repair Cartridge - w/2 Plunger (1:1, 2:1, 4:1,10:1)Rock solid design, is sturdy enough to get the job done without breaking, even when dispensing very viscous materials. Its size is 19 x 18 x 6cm 7. 48" x 7. 09" x 2. 36" Suitable for 50ml combination packs. It is not necessary to pay too much attention to piston diameter when choosing, as this tool is also suitable for similar material combination packages with 2: 1 and 1: 1 mixing ratios. Available as an alternative to standard 50ml cartridges from