Mentor Freedom Cath External Catheter - Case of 100 MEN8000-400Cs Our Low Price:$160.72 In Basket: None Select Size: 23mm - Small Blue 28mm - Medium Red 31mm - Internediate Green 35mm - Large Gold Self–adhering latex catheters require no straps and come in 3 color coded sizes.Small (blue), 23mm – Case of 100.