Part # Price Part#A6.5MM Size5.00mm Diameter5" Usable1.50mm Overall Len.6.00mm $8.61 Add Part#A6.550MM Size5.50mm Diameter5.5" Usable1.50mm Overall Len.6.00mm $8.20 Add Part#A6.6MM Size6.00mm Diameter6" Usable1.50mm Overall Len.6.00mm $10.87 Add Part#A6.7MM Size7.00mm Diameter7" Usable1.50mm Overall Len.6.00mm $11.51 Add Part#A6.8MM Size8.00mm Diameter8" Usable1.50mm Overall Len.6.00mm $11.79 Add