NE-5-OCL Micro Tubes / Off-Coil Lock For use in a standard 5mm thin walled sample tube. Lock volume ~110ul $35.34 PRICE BREAKS - The more you buy, the more you save Quantity 11+ Price $33.58 Qty: Add to cart Lock volume ~110ul The OFF-Coil Lock system allows you to maximize the sample in the coil while attaining a lock signal.