SLC 3-way standard Lubricious Coated 20Ch/Fr 30 mL/cc || Product Usage: Latex Lubricous Coated Foley Catheters The standard catheter essentially consists of a flexible lubricous coated latex tube which incorporates one major drainage lumen and one or two minor lumens constructed in the wall of the tube. One minor lumen is for inflating the retention balloon (available in 2-Way & 3-Way catheters). The second minor lumen (applicable for 3 Way catheters only) is used for bladder irrigation purposes.