Heavy Duty Metal Comb set 1-8 including caddy Each comb is spring loaded to fit securely on to your clipper. These combs will fit most OA, 1A and #1 size blades. No.1 Comb Attachment 3mm cutting length No.2 Comb Attachment 6mm cutting length No.3 Comb Attachment 9mm cutting length No.4 Comb Attachment 13mm cutting length No.5 Comb Attachment 16mm cutting length No.6 Comb Attachment 18mm cutting length No.7 Comb Attachment 22mm cutting length No.8 Comb Attachment 25mm cutting length