Titanium Pentalite Running Guides A Titanium Guide Frame Exclusive Slim Profile Pentalite Inserts Reduced Ring Weights Snagless TiForged Frame Design Light Weight Flexible Titanium Material Offered In Solid Titanium or Black Titanium MODEL HEIGHT A HEIGHT B HEIGHT C WEIGHT RING ID FOOT LENGTH TOTAL LENGTH PITRS-3 1.80 mm 3.50 mm 4.91 mm > 0.10 gm 2.10 mm 5.36 mm 9.52 mm PITRS-4 1.90 mm 4.10 mm 5.52 mm > 0.10 gm 2.94 mm 5.45 mm 9.81 mm PITRS-4.5 1.95 mm 4.90 mm 6.24 mm > 0.10 gm 3.24 mm 6.17 mm 10.76 mm PITRS-5 2.07 mm 5.67 mm 7.24 mm > 0.10 gm 3.59 mm 7.23 mm 11.75 mm PITRS-5.5 2.75 mm 6.29 mm 7.61 mm 0.10 gm 4.02 mm 7.57 mm 12.15 mm PITRS-6 3.05 mm 7.85 mm 8.04 mm 0.20 gm 4.26 mm 9.38 mm 13.70 mm PITRS-7 3.35 mm 8.45 mm 10.14 mm 0.20 gm 4.87 mm 9.90 mm 13.55 mm PITRS-8 3.80 mm 9.90 mm 11.26 mm 0.20 gm 5.83 mm 10.47 mm 15.54 mm PITRS-10 5.75 mm 13.65 mm 14.47 mm 0.50 gm 7.76 mm 11.49 mm 17.15 mm