HEFG Batson Freshwater/Inshore Cork Foam Fore Grips High end grips featuring EVA and high density cork composite trim, bore inner diameter is .375in, boss outer diameter rear is .775in, boss outer diameter front is .890in, these can also be modified to use with a spinning seat by removing the front boss, suggested reel seats are any size 16,17 GTB casting seats, any GT 16,17 and 18 casting seats, suggested butt caps are HDCCBC20, HDCCBC20F and all other Batson size 20 butt caps