Bard Silastic - Latex Foley Catheter with smooth, silicone exterior coating to reduce calcification build-up. This Bard Foley catheter is firm but flexible with a large drainage lumen. Available in 5cc and 30cc balloon sizes. The 2-Way Latex Foley Catheters with the 5cc balloon size are available by the each or by the case. 30cc balloon size catheters are available by the case only. Sterile.