BT-4 Field Parts Kit Playing Gear Hammerhead Fins (Sizers) are designed

Hammerhead Fins (Sizers) are designed to match the ball size to the barrel

Outer mesh pockets

Saved Settings - All settings stored in non-volatile memory so they are not lost when the battery is removed

New contoured Rubber Grips and Push Button Console

TECHT's "even-flo" face design allows for a much quieter sound signature while also improving consistency & accuracy

BT-4 Field Parts Kit Playing Gear Hammerhead Fins (Sizers) are designedReplacement parts to service up to five BT 4 markers Field Parts Kit Includes: 2 Front Bolts 2 Front Bolt O Rings 5 Ball Detent Assemblies 5 Drive Springs 4 Valve Lock Screws 1 Long Receiver Bolt 4 Short Receiver Bolts 1 Lower Grip Bolt 1 Lower Grip Nut 2 Shock Absorber O Rings